Begin verified five-sequence source ingest

Archive_Specifications.md

@@ -42,12 +42,17 @@ landscape sources.
 Do not infer a rotation, crop, or transcode solely from dimensions. Such a
 transformation should be asserted only when supported by provenance evidence.
 
-### Acquisition evidence and canonical assembly
-
-Framelapse source fragments are retained unchanged as acquisition evidence. One
-verified chronological InShot assembly remains the canonical media object for
-each drawing record. Dynamic browser previews and physical-reference photographs
-are noncanonical access or evidence layers linked through persistent identity.
+### Acquisition evidence and canonical representation
+
+Framelapse source fragments are retained unchanged as acquisition evidence. A
+reviewed drawing may be represented canonically either by one selected
+chronological InShot assembly or by a complete, verified `RecNN` sequence of
+unchanged source fragments. In fragment-sequence mode, every source file has its
+own canonical metadata row while grouping, order, completeness, and derivative
+coverage remain in a separate noncanonical relationship manifest. This does not
+change the 29-field schema or retroactively redefine existing records. Dynamic
+browser previews and physical-reference photographs remain noncanonical access
+or evidence layers linked through persistent identity.
 
 A 2160 × 3840 portrait H.264, 30-fps InShot processing profile is documented as
 a candidate. It does not become a canonical protocol boundary until one complete

CHANGELOG.md

@@ -1,5 +1,31 @@
 # Changelog
 
+## Unreleased — August 24–27 complete fragment-sequence ingestion
+
+- Added 22 creator-confirmed, unchanged canonical Framelapse source fragments
+  totaling 17,389,875,055 bytes and 3,391.699091 seconds of encoded playback.
+- Preserved five complete drawing sequences as ordered `RecNN` sets containing
+  2, 2, 6, 2, and 10 canonical fragments.
+- Increased active membership to 385 Standard plus 128 Pre-Standard records,
+  or 513 total, without changing the 29-field schema or
+  `standard-2025-07-13` protocol ID.
+- Added a separate 27-row, 15-field dated relationship sidecar covering the 22
+  canonical fragments and five unchanged noncanonical InShot derivatives.
+- Stored the five derivatives under the nested provenance `InShot/` directory;
+  they remain outside both active metadata indexes, Viewer configurations, and
+  active byte and duration totals.
+- Retained media-object-level `record_id` identity. This update does not add a
+  global `work_id`, backfill historical rows, create a v3 release, or otherwise
+  bump the dataset version.
+- Verified the 27 planned media additions, with no deletion or changed existing
+  path, at immutable media-only PR revision
+  `bb4160045cae21a71bf360278549398dc9d2a028`.
+- Verified all 27 relationship paths, SHA-256 values, byte sizes, Xet
+  identities, canonical metadata joins, and exact root metadata bytes against
+  immutable metadata-bearing PR revision
+  `8a21015210c19936d3b18175ae3f4061ae1e5d8d`. This validation does not assert
+  Viewer settlement or merge status.
+
 ## Unreleased — June 2026 recording-sequence filename correction
 
 - Corrected the canonical paths of 15 existing 30 × 40 in recordings dated

Physical_References/CAPTURE_AND_INGEST_PROTOCOL.md

@@ -8,16 +8,22 @@ record before becoming a canonical processing-profile boundary.
 1. **Framelapse source fragments** are acquisition evidence. Preserve them
    unchanged with original filename, byte size, duration, stream properties,
    order, and SHA-256.
-2. **One chronological InShot assembly** remains the canonical public media
-   object for a drawing record.
+2. **Canonical representation** may be either one reviewed chronological
+   assembly or a complete, verified `RecNN` sequence of unchanged source
+   fragments. In fragment-sequence mode, each source file is one canonical
+   media record and the noncanonical relationship manifest preserves grouping,
+   order, and completeness.
 3. **Dynamic browser previews** are noncanonical access derivatives bound to
    `record_id`, integrity identity, and a pinned source revision.
 4. **Drawing-reference photographs** are separate noncanonical physical-state
    evidence linked through the sidecar only after review.
 
-Making every Framelapse fragment a canonical row would change the archive's
-unit of observation from one drawing record to an editing fragment. This
-candidate rejects that change.
+The canonical index remains media-object-level. A reviewed fragment sequence
+may therefore use multiple canonical rows for one drawing without adding a
+`work_id` or changing the 29-field schema. This does not retroactively
+reinterpret historical records or establish a new archive version. An InShot
+output not selected as canonical remains a noncanonical provenance derivative,
+and its source coverage must be stated explicitly.
 
 ## Current documented acquisition profile
 
@@ -75,10 +81,12 @@ acceptable when needed.
 Retain every fragment unchanged before assembly. Never rename or transcode the
 only copy. Record original filename, bytes, duration, streams, and SHA-256.
 
-### Assemble
+### Assemble when selected
 
-Place fragments in observed chronological order in InShot. Apply the candidate
-4K/30-fps profile without presentation edits.
+When an assembly is intentionally selected, place fragments in observed
+chronological order in InShot and apply the candidate 4K/30-fps profile without
+presentation edits. Assembly is not required for a reviewed fragment-sequence
+ingest.
 
 ### Verify
 
@@ -89,16 +97,20 @@ unchanged.
 
 ### Manifest
 
-Write one assembly manifest with `record_id`, ordered fragment identities,
-source/output hashes, capture and processing settings, software versions,
-evidence state, and explicit nulls for unresolved variables.
+Write one relationship manifest with canonical `record_id` values, ordered
+fragment identities, source/output hashes, capture and processing settings,
+software versions, evidence state, and explicit nulls for unresolved variables.
 
 ### Ingest
 
-Upload only the reviewed InShot assembly as canonical record media with the
-normal 29-field metadata row. Keep detailed fragment relationships in a
-separate manifest. Ingest physical-reference photographs only as noncanonical
-linked media with their own hashes and privacy review.
+For assembly mode, upload only the reviewed InShot assembly as canonical record
+media with the normal 29-field metadata row. For fragment-sequence mode, upload
+each verified unchanged source fragment as a canonical `RecNN` record with its
+normal metadata row and keep grouping, order, completeness, and derivative
+coverage in a separate noncanonical relationship manifest. InShot outputs not
+selected as canonical remain provenance derivatives. Ingest physical-reference
+photographs only as noncanonical linked media with their own hashes and privacy
+review.
 
 ### Derive
 

README.md

@@ -83,7 +83,7 @@ dataset_info:
     dtype: large_string
   splits:
   - name: archive
-    num_examples: 363
+    num_examples: 385
 - config_name: pre_standard
   features:
   - name: video
@@ -283,12 +283,12 @@ configs:
 
 # time-lapse-artifacts
 
-491 time-lapse recordings of one artist's traditional drawing practice across
-nearly two years (September 2024–August 23, 2026), with standardized acquisition
-since July 13, 2025. Across approximately 2.00 TB of video, the archive follows
+513 time-lapse recordings of one artist's traditional drawing practice across
+nearly two years (September 2024–August 27, 2026), with standardized acquisition
+since July 13, 2025. Across approximately 2.02 TB of video, the archive follows
 the same artist working in physical media—including pencil, ballpoint pen,
 fountain pen, brush, graphite, and ink—on fixed-format paper and illustration board.
-The release combines 363 canonical Standard videos and 128 earlier
+The release combines 385 canonical Standard videos and 128 earlier
 Pre-Standard recordings. Every published video has a persistent record ID,
 content hash, byte size, and encoded-stream metadata; historical session and
 provenance fields remain less complete in the Pre-Standard tier.
@@ -306,12 +306,13 @@ ownership or sale.
 An earlier 2012–2016 archive of more than 8 TB also exists, consisting
 primarily of uploaded 1080p drawing videos, with some livestream-derived
 material. It is not yet published in this dataset and is excluded from the
-current 491-record, 2.00-TB release totals. This is an active construction
+current 513-record, 2.02-TB release totals. This is an active construction
 release.
 
 ## Snapshot and Coverage
 
-These counts describe the current `main` branch. The immutable `v0.3.0` tag
+These counts describe the active construction state represented by this
+revision. The immutable `v0.3.0` tag
 contains 467 rows: 338 Standard and 129 Pre-Standard. A later curator-verified
 provenance correction promoted one distinct Standard recording from the
 noncanonical unresolved subtree. A subsequent creator-verified ingestion added
@@ -328,18 +329,26 @@ A later creator-confirmed filename correction preserves the complete
 `Rec01`–`Rec15` order of 15 existing 30 × 40 in recordings dated June 18–30.
 Their media payloads, stable IDs, hashes, metadata membership, and release
 counts are unchanged.
+The August 24–27 fragment-sequence ingestion adds 22 unchanged canonical
+Framelapse recordings across five creator-confirmed complete sequences. Five
+unchanged InShot outputs remain noncanonical derivatives in a nested provenance
+directory and are excluded from the active indexes and Viewer. A separate
+27-row, 15-field relationship sidecar records grouping, order, completeness,
+and derivative coverage. This active-construction update does not create a new
+version tag, change the 29-field video schema or acquisition-protocol
+identifier, backfill historical records, or introduce a global `work_id`.
 Two records from the 17-object ingestion and the promoted July 13 record are
 explicitly documented as shortened derivatives rather than full-duration
 masters.
 
 | Collection tier | Published MP4s | Indexed rows | Date coverage | Metadata state |
 | --- | ---: | ---: | --- | --- |
-| `standard` | 363 direct files | 363 | 2025-07-13–2026-08-23 | Complete core technical metadata for every direct Standard file |
+| `standard` | 385 direct files | 385 | 2025-07-13–2026-08-27 | Complete core technical metadata for every direct Standard file |
 | `pre_standard` | 128 | 128 | 2024-09-17–2025-07-09, plus 9 unknown dates | Complete core technical metadata; historical descriptive and provenance gaps remain |
 | Earlier archive (unpublished) | 0 public videos | 0 | Historical scope 2012–2016 | More than 8 TB held outside this release; ingestion pending |
 
-**Current published index:** `main` contains 491 rows: 363 Standard and 128
-Pre-Standard. The preceding v0.1 state at revision
+**Current indexed state:** this revision contains 513 rows: 385 Standard and
+128 Pre-Standard. The preceding v0.1 state at revision
 `339e6149de130cbe2d001f7a0e5247872bc788ec` exposed 465 rows: 335 Standard and
 130 Pre-Standard. v0.2 added three previously unindexed Standard files and
 removed one Pre-Standard row whose media did not meet the ownership and
@@ -360,7 +369,7 @@ train/validation/test partition has been defined.
 The release exposes two explicit configurations so metadata-complete canonical
 records are not silently mixed with historically less complete records:
 
-- `canonical/archive` is the default and loads root `metadata.csv` with the 363
+- `canonical/archive` is the default and loads root `metadata.csv` with the 385
   direct files in `Standard_Time_Lapses/`
 - `pre_standard/archive` loads `Pre_Standard_Time_Lapses/metadata.csv` with the
   128 direct files in that folder
@@ -373,7 +382,7 @@ zero or false. Both indexes declare tier membership directly: the root index set
 `collection_tier = standard` and `is_canonical = true`; the Pre-Standard CSV
 sets `collection_tier = pre_standard` and `is_canonical = false`.
 
-Published-index completeness is defined by the 363 rows in `canonical/archive`
+Published-index completeness is defined by the 385 rows in `canonical/archive`
 plus the 128 rows in `pre_standard/archive` and their generated Parquet
 exports. Hugging Face's separate column Statistics job is an auxiliary,
 asynchronous surface; its availability is not used to claim or reject
@@ -399,7 +408,7 @@ materials, studios, or drawing practices broadly.
 
 ### `Standard_Time_Lapses/`
 
-The directory contains 363 direct MP4 files. `metadata.csv` is their complete
+The directory contains 385 direct MP4 files. `metadata.csv` is their complete
 machine-readable canonical index: every direct file has one validated row with
 core technical metadata. Direct placement alone is not sufficient for future
 additions; metadata and release validation are required.
@@ -504,12 +513,23 @@ downloadable. See the [sidecar schema](Physical_References/SCHEMA.md) and
 
 The acquisition protocol effective July 13, 2025 is documented in
 `Archive_Specifications.md`. Framelapse source fragments remain unchanged
-acquisition evidence, while one verified chronological InShot assembly remains
-the canonical media object for each drawing record. A documented 4K/30-fps
-processing profile remains a candidate and does not retroactively redefine
-existing records. See the
+acquisition evidence. A reviewed drawing may be represented canonically either
+by one selected chronological assembly or by a complete, verified `RecNN`
+sequence of unchanged source fragments. Grouping, order, completeness, and
+noncanonical derivative coverage remain in a separate relationship manifest;
+the active 29-field metadata schema is unchanged. A documented 4K/30-fps
+InShot processing profile remains a candidate and does not retroactively
+redefine existing records. See the
 [capture and ingest protocol](Physical_References/CAPTURE_AND_INGEST_PROTOCOL.md).
 
+The dated
+[`fragment_sequence_relationships.csv`](Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv)
+sidecar has 27 rows and 15 fields: 22 canonical fragment rows across five
+complete sequences and five noncanonical InShot derivative rows. Its
+`fragment_set_label` is a descriptive grouping label, not a global `work_id`.
+The nested derivative payloads are not included in the 513 active rows or the
+active byte and duration totals.
+
 The protocol's capture orientation and a file's stored pixel orientation are
 different concepts. The `orientation`, `width_px`, and `height_px` metadata
 describe the published encoded file. Historical canonicalization may include a
@@ -606,8 +626,8 @@ audio by default while preserving the archival masters.
 
 ## Access and Reproducibility
 
-The active 491-video release contains 2,002,781,484,144 bytes of video
-(approximately 2.00 TB, or 1.82 TiB). Canonical files are often several
+The active 513-video release contains 2,020,171,359,199 bytes of video
+(approximately 2.02 TB, or 1.84 TiB). Canonical files are often several
 gigabytes each, so users should select records through `metadata.csv` before
 downloading video.
 
@@ -717,10 +737,18 @@ See `CHANGELOG.md` for release-level changes.
 - `RELEASE_MANIFEST.json` — historical v0.2.0 release-candidate manifest; it
   does not describe current `main` or provide checksums for the video payloads
 - `tools/capture_hub_inventory.py` — pinned Hub/Xet identity inventory
+- `tools/test_inventory_binding.py` — self-contained revision/metadata-binding
+  regression tests
 - `tools/download_verified.py` — selected download and byte-integrity check
 - `tools/enrich_prestandard.py` — pinned Pre-Standard technical enrichment
 - `tools/validate_metadata.py` — cross-tier metadata and repository checks
+- `tools/validate_fragment_relationships.py` — dated sequence and derivative
+  relationship checks against the pinned inventory
 - `Standard_Time_Lapses/Provenance/` — historical evidence and mappings
+- `Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv`
+  — dated fragment-sequence and noncanonical-derivative relationship sidecar
+- `Standard_Time_Lapses/Provenance/2026-08-27/README.md` — scope, identity,
+  exclusion, and revision-binding notes for the dated sidecar
 
 ## Citation
 

SCHEMA.md

@@ -58,8 +58,9 @@ therefore preserve tool and medium sets without manufacturing positional pairs.
 directly in `Standard_Time_Lapses/`. Direct placement alone does not make a file
 canonical: every released canonical file must have exactly one metadata row,
 complete required technical fields, and the necessary rights and provenance
-clearance. The canonical index contains 363 validated records and covers every MP4
-stored directly in `Standard_Time_Lapses/` at the pinned revision.
+clearance. The active-construction candidate contains 385 records. Before
+publication, it must cover every MP4 stored directly in
+`Standard_Time_Lapses/` at the exact reviewed revision.
 
 The canonical index does not make provenance, unresolved, pre-standard, or
 legacy files canonical.
@@ -179,6 +180,56 @@ Observed evidence methods include:
 
 New enumerated values must be documented here before use.
 
+## Fragment-sequence relationship sidecar
+
+`Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv`
+is a derived relationship table with one row per media object in the dated
+ingestion. It has 27 rows and 15 fields: 22 canonical Framelapse fragments
+across five owner-confirmed complete sequences and five noncanonical InShot
+derivatives. It does not add fields to either 29-field video index.
+
+| Field | Type | Meaning |
+| --- | --- | --- |
+| `fragment_set_label` | string | Descriptive canonical filename stem shared by one reviewed sequence; not a global `work_id`. |
+| `object_role` | enum | `canonical_fragment` or `noncanonical_inshot_derivative`. |
+| `record_id` | string or blank | Persistent canonical identity; required for canonical fragments and blank for noncanonical derivatives. |
+| `file_path` | string | Unique repository-relative MP4 path. |
+| `sha256` | string | Ordinary byte-level SHA-256 of the represented object. |
+| `hub_xet_hash` | string | Hugging Face Xet identity at the pinned revision; distinct from ordinary SHA-256. |
+| `size_bytes` | integer | Exact object size in bytes. |
+| `sequence_position` | integer or blank | Contiguous one-based position for a canonical fragment. |
+| `sequence_count` | integer or blank | Total canonical fragment count for the sequence. |
+| `sequence_completeness` | enum | Owner-reviewed completeness of the underlying canonical source sequence; all dated rows use `owner_confirmed_complete`, while `derivative_coverage` separately states whether a derivative covers all of that sequence. |
+| `source_record_ids` | semicolon-delimited string or blank | Ordered canonical source IDs for a derivative; blank on canonical rows. |
+| `derivative_coverage` | enum or blank | `complete_sequence` or `partial_sequence` for a derivative; blank on canonical rows. |
+| `evidence_state` | semicolon-delimited string | Only evidence checks actually completed for the object and relationship. |
+| `source_hub_revision` | string | Immutable 40-hex Hub commit that permits the canonical identity and path join to be checked. |
+| `notes` | string or blank | Literal qualifications that do not belong in the categorical fields. |
+
+Within each fragment set, canonical positions must be unique and contiguous
+from one through `sequence_count`. A `complete_sequence` derivative must list
+the full ordered canonical source sequence, and every derivative source must
+belong to the same fragment set. Derivative rows and payloads remain outside
+the canonical metadata and Viewer configurations even when stored in the
+repository.
+
+For this dated sidecar, canonical-fragment evidence is exactly
+`owner-confirmed`, `boundary-frame-verified`, `checksum-computed`,
+`media-probed`, `demux-verified`, and `sampled-decode-verified`.
+Noncanonical-derivative evidence is exactly `sampled-frame-verified`,
+`duration-arithmetic-verified`, `checksum-computed`, `media-probed`,
+`demux-verified`, and `sampled-decode-verified`. Derivative
+`sequence_position` is blank, `sequence_count` equals its canonical set size,
+and any partial `source_record_ids` retain canonical sequence order.
+
+`source_hub_revision` must be copied from an actual immutable remote commit; a
+moving branch, placeholder, or inferred value is invalid. Remote inventory,
+Xet-identity, and relationship-join validation remain pending until that commit
+exists and is checked. The captured inventory also binds the exact bytes of
+that revision's `metadata.csv`, so a local join cannot substitute metadata from
+a different commit. This sidecar does not introduce `work_id`, backfill
+historical rows, change `standard-2025-07-13`, or create a new dataset version.
+
 ## Physical-reference sidecar
 
 `Physical_References/endpoint_references.csv` is an optional derived
@@ -229,6 +280,12 @@ Before publication, the validator must confirm:
   than silently treated as released data
 - material lacking the necessary ownership or provenance clearance is absent
   from both active indexes
+- fragment-sequence positions are contiguous and complete-sequence derivative
+  source lists exactly match their own ordered fragment set
+- noncanonical derivative payloads remain absent from both active indexes and
+  Viewer configurations
+- relationship paths, Xet identities, sizes, and canonical `record_id` joins
+  resolve at the exact declared `source_hub_revision`
 
 Run:
 

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Standard_Time_Lapses/Provenance/2026-08-27/README.md

@@ -0,0 +1,35 @@
+# Recording relationship provenance — 2026-08-27
+
+This dated provenance layer documents five creator-confirmed complete drawing
+sequences represented by 22 unchanged canonical Framelapse recordings and five
+noncanonical InShot derivatives.
+
+`fragment_sequence_relationships.csv` contains one row per media object in this
+ingestion. Its 27 rows and 15 fields cover 22 canonical fragment
+objects and five noncanonical derivative objects. `fragment_set_label` is the
+shared descriptive canonical filename stem; it is not a global `work_id`.
+Canonical fragment rows carry their persistent `record_id`, contiguous sequence
+position, sequence count, ordinary source-file SHA-256, Hub Xet identity, and
+evidence state. The five complete sets contain 2, 2, 6, 2, and 10 canonical
+fragments. Derivative rows remain outside the active canonical index and use
+`source_record_ids` to identify their ordered canonical sources and
+`derivative_coverage` to distinguish a complete assembly from a partial
+transcode.
+
+The `sha256` column is an ordinary byte-level SHA-256. `hub_xet_hash` is the
+separate Hugging Face Xet identity. These values are not interchangeable.
+Every `source_hub_revision` value pins the immutable metadata-bearing PR commit
+`8a21015210c19936d3b18175ae3f4061ae1e5d8d`. At that revision, all 27 paths,
+ordinary SHA-256 values, byte sizes, Xet identities, all 22 canonical metadata
+joins, and the exact root `metadata.csv` bytes passed validation. The sidecar is
+committed afterward and deliberately points back to this metadata-bearing
+revision, avoiding a circular self-reference. A moving branch, placeholder, or
+inferred revision is invalid.
+
+The five unchanged derivative payloads are stored under `InShot/`. Their
+presence in this nested provenance directory does not make them canonical or
+include them in the active Dataset Viewer configuration.
+
+This relationship layer does not change the 29-field active video schema,
+introduce a global `work_id`, backfill historical rows, change
+`standard-2025-07-13`, or create a new dataset version.

Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv

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+fragment_set_label,object_role,record_id,file_path,sha256,hub_xet_hash,size_bytes,sequence_position,sequence_count,sequence_completeness,source_record_ids,derivative_coverage,evidence_state,source_hub_revision,notes
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+2026-08-24.0638.BallpointPen.Ink.Paper.12x9,noncanonical_inshot_derivative,,Standard_Time_Lapses/Provenance/2026-08-27/InShot/InShot_20260824_063924874.mp4,97704e2b7515d98f904cca126f4eb48a42e7eae322329f784c281ad1566b33d6,5cc94f5407a3d96155b08f2bb915753cc807b003138631427e7b5170965cb3be,4564449205,,2,owner_confirmed_complete,tla-e31f5059a75da52c;tla-e6314ca067353edc,complete_sequence,sampled-frame-verified; duration-arithmetic-verified; checksum-computed; media-probed; demux-verified; sampled-decode-verified,8a21015210c19936d3b18175ae3f4061ae1e5d8d,InShot assembled-from derivative. H.264 re-encode with AAC audio present; sampled audio was effectively silent.
+2026-08-25.1941.BallpointPen.Ink.Paper.9x12,noncanonical_inshot_derivative,,Standard_Time_Lapses/Provenance/2026-08-27/InShot/InShot_20260825_010657858.mp4,ad2532ac75b3b6741c0e7ed28db61f45d656f0af3ceeaa7c8f52735f1e1586ac,699ab0644f79089e108c720d7e06093e3538ea60ef0b769aff800c83c677a736,2453535699,,6,owner_confirmed_complete,tla-3a4ed6625d6aae32,partial_sequence,sampled-frame-verified; duration-arithmetic-verified; checksum-computed; media-probed; demux-verified; sampled-decode-verified,8a21015210c19936d3b18175ae3f4061ae1e5d8d,InShot transcode-of derivative. H.264 re-encode with AAC audio present; sampled audio was effectively silent.
+2026-08-25.1941.BallpointPen.Ink.Paper.9x12,noncanonical_inshot_derivative,,Standard_Time_Lapses/Provenance/2026-08-27/InShot/InShot_20260825_020840899.mp4,74982a01d28a82a46b84b823b57a5b19480206de657b26637ffc9414ae985811,75dda0ba50051a59a7d153dbb2208775be3b03d411ca5cf4358e6766a63c567e,1216484201,,6,owner_confirmed_complete,tla-3a4ed6625d6aae32,partial_sequence,sampled-frame-verified; duration-arithmetic-verified; checksum-computed; media-probed; demux-verified; sampled-decode-verified,8a21015210c19936d3b18175ae3f4061ae1e5d8d,InShot transcode-of derivative. H.264 re-encode with AAC audio present; sampled audio was effectively silent.
+2026-08-24.0638.BallpointPen.Ink.Paper.12x9,noncanonical_inshot_derivative,,Standard_Time_Lapses/Provenance/2026-08-27/InShot/InShot_20260825_022746877.mp4,21e86d224a4fe816dc4ee90ee334b11e10074ab386e804d36d276670b2059bda,8ea2e2b8f99b5e0af066711f1a048a33ad454bf899a0e7c60d501a70ec715360,2276248316,,2,owner_confirmed_complete,tla-e31f5059a75da52c;tla-e6314ca067353edc,complete_sequence,sampled-frame-verified; duration-arithmetic-verified; checksum-computed; media-probed; demux-verified; sampled-decode-verified,8a21015210c19936d3b18175ae3f4061ae1e5d8d,InShot assembled-from derivative. H.264 re-encode with AAC audio present; sampled audio was effectively silent.

VALIDATION.md

@@ -2,15 +2,18 @@
 
 ## Scope
 
-The current post-v0.3 main-branch candidate validates:
+The current post-v0.3 active-construction candidate validates locally and
+against an immutable pull-request revision:
 
-- all 363 canonical Standard rows and direct Standard MP4 paths
+- all 385 canonical Standard rows and candidate direct Standard MP4 paths
 - all 128 active Pre-Standard rows and direct Pre-Standard MP4 paths
 - persistent record identity and cross-tier uniqueness
-- exact Hub Xet file IDs and stored byte sizes
-- container-header technical metadata for every active published MP4
-- repository membership, filename rules, field types, numeric ranges, and
-  stored-orientation consistency
+- locally audited byte sizes and technical metadata for the 22 new fragments
+- container-header technical metadata for every active or candidate MP4
+- candidate filename rules, field types, numeric ranges, and stored-orientation
+  consistency
+- a 27-row, 15-field relationship sidecar covering 22 canonical fragments and
+  five noncanonical derivatives across five complete sequences
 
 One 6,587,685,497-byte provenance object is promoted to the canonical root,
 and the distinct 496,296,535-byte object previously occupying its corrected
@@ -47,23 +50,55 @@ batch retains literal `Rec01` through `Rec03` sequence suffixes and documents a
 creator-confirmed Rec03 change from Pelikan black to unmarked, unknown-brand
 black ink at approximately `00:04:59`.
 
+The August 24–27 fragment-sequence ingestion adds 22 creator-confirmed,
+unchanged Framelapse source objects totaling 17,389,875,055 bytes and
+3,391.699091 seconds of encoded playback. They represent five complete
+sequences and are stored as landscape video without audio. Five unchanged
+InShot outputs remain nested noncanonical provenance derivatives and are
+excluded from active row, byte, duration, orientation, and audio totals. The
+relationship sidecar records all 27 media objects without changing the
+29-field video schema, `standard-2025-07-13`, or historical rows, and without
+introducing a global `work_id`.
+
 ## Result
 
-**PASS — zero structural validation errors**
+**LOCAL STRUCTURAL AND IMMUTABLE-PR PASS — zero validation errors**
 
 | Check | Result |
 | --- | ---: |
-| Active indexed rows | 491 |
-| Canonical Standard rows | 363 |
+| Active indexed rows | 513 |
+| Canonical Standard rows | 385 |
 | Pre-Standard rows | 128 |
 | Metadata columns per index | 29 |
-| Unique persistent `record_id` values | 491 |
-| Unique nonblank content hashes | 491 |
-| Complete encoded-video metadata | 491/491 |
-| Canonical repository paths matched | 363/363 |
-| Pre-Standard repository paths matched | 128/128 |
+| Unique persistent `record_id` values | 513 |
+| Complete encoded-video metadata with remote Xet binding | 513/513 |
 | Stored-orientation conflicts | 0 |
-| Duplicate active content hashes | 0 |
+| Duplicate local SHA-256 values among the 27 new media objects | 0 |
+| New media objects remotely bound by SHA-256, size, and Xet identity | 27/27 |
+| Fragment-sequence relationship rows | 27 |
+| Relationship fields | 15 |
+| Canonical fragments / noncanonical derivatives | 22 / 5 |
+| Owner-confirmed complete sequences | 5 |
+| Base-to-metadata-revision diff | 39 expected paths; 0 deletions |
+| Inventory-binding regression tests | 5/5 |
+
+**REMOTE PR INVENTORY AND RELATIONSHIP VALIDATION — PASS**
+
+The sidecar's `source_hub_revision` pins the immutable metadata-bearing PR
+commit `8a21015210c19936d3b18175ae3f4061ae1e5d8d`. At that revision, validation
+confirmed 385/385 direct Standard paths, 128/128 direct Pre-Standard paths,
+all 27 relationship paths, ordinary SHA-256 values, byte sizes, Xet identities,
+and all 22 canonical `record_id` joins. The remote root `metadata.csv` receipt
+matches the local 208,651-byte file at SHA-256
+`0de0b9111effa84cd41b13f93e6627b9b94f33f648dd29ded5d4eb8a85c5bfad`.
+The relationship validator reported 27 rows, 22 canonical fragments, five
+noncanonical derivatives, five complete sets, and zero errors.
+
+The media-only PR head `bb4160045cae21a71bf360278549398dc9d2a028`
+contained exactly the 27 planned additions relative to the pinned base, with
+zero deletions or changed existing paths. The metadata-bearing revision has
+exactly the expected 39-path cumulative diff and zero deletions. Viewer
+settlement and merge are separate gates and are not asserted by this PASS.
 
 Both Hub builder configurations explicitly declare the same 29 features. This
 prevents per-CSV inference from representing an integer-only canonical
@@ -72,13 +107,13 @@ fractional rates as `float64` in the Pre-Standard configuration.
 
 ## Audited statistics
 
-- Total indexed playback duration: 52.647 hours
-- Canonical playback duration: 43.052 hours
+- Total indexed playback duration: 53.590 hours
+- Canonical playback duration: 43.994 hours
 - Pre-Standard playback duration: 9.596 hours
-- Median active-record playback duration: 337.325 seconds
-- Total indexed video size: 2.003 TB decimal
-- Stored orientation: 479 portrait, 12 landscape
-- Audio streams: 485 present, 6 absent
+- Median active-record playback duration: 310.172 seconds
+- Total indexed video size: 2,020,171,359,199 bytes (2.020 TB decimal)
+- Stored orientation: 479 portrait, 34 landscape
+- Audio streams: 485 present, 28 absent
 - Unknown finish dates: 9
 - Unknown finish times: 62
 
@@ -109,7 +144,9 @@ fractional rates as `float64` in the Pre-Standard configuration.
    drawing-time sampling.
 8. The 2012–2016 layer has no public video payload at this snapshot.
 9. Separate Hub configurations prevent tier mixing, but no leakage-safe
-   train/validation/test partition has been defined.
+   train/validation/test partition has been defined. The dated
+   `fragment_set_label` is not a global `work_id`, so no work-level split is
+   currently possible.
 
 ## Reproduction
 
@@ -124,12 +161,22 @@ For the strongest repository-inventory check, first augment the pinned Hub API
 JSON with the Xet file IDs returned by the same revision's resolve headers:
 
 ```bash
+curl --fail --location \
+  --output repo_api_blobs.json \
+  "https://huggingface.co/api/datasets/maxwellinked/time-lapse-artifacts/revision/<40-hex-commit>?blobs=true"
+
 python tools/capture_hub_inventory.py \
   --repo-json repo_api_blobs.json \
-  --revision "<revision-under-review>" \
+  --repo-id maxwellinked/time-lapse-artifacts \
+  --revision "<40-hex-commit>" \
   --output repo_inventory_xet.json
 ```
 
+The helper also fetches the small root `metadata.csv` at that immutable
+revision and records its exact SHA-256, byte size, and `X-Repo-Commit` receipt
+under `validationFiles`. The relationship validator rejects a local metadata
+file whose bytes do not match that receipt.
+
 Then validate paths, Xet identities, and exact byte sizes together:
 
 ```bash
@@ -138,6 +185,27 @@ python tools/validate_metadata.py metadata.csv \
   --repo-inventory-json repo_inventory_xet.json
 ```
 
+Validate the dated relationship sidecar against the immutable metadata-bearing
+revision recorded in `source_hub_revision`. Confirm all 27 unique paths, Xet
+identities, and sizes; all 22 canonical `record_id` joins; contiguous `RecNN`
+positions; five complete ordered source sets; derivative source lists limited
+to their own set; and exclusion of the five nested derivatives from both active
+indexes and Viewer configurations.
+
+```bash
+python tools/validate_fragment_relationships.py \
+  --relationships Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv \
+  --metadata metadata.csv \
+  --repo-inventory-json repo_inventory_xet.json
+```
+
+The inventory-binding regression suite is self-contained and performs no Hub
+writes:
+
+```bash
+python tools/test_inventory_binding.py
+```
+
 A plain JSON list of repository paths is also accepted through the legacy
 `--repo-files-json` spelling, but that checks membership only; it cannot
 independently verify hashes or byte sizes.

VIEWER_MIGRATION.md

@@ -10,13 +10,18 @@ machine-learning split.
 
 The release candidate defines:
 
-- `canonical/archive` — default; 360 direct Standard MP4 files
+- `canonical/archive` — default; 385 direct Standard MP4 files
 - `pre_standard/archive` — 128 direct Pre-Standard MP4 files
 
 Both configurations use explicit direct-file globs. The canonical glob does
 not recurse into `Standard_Time_Lapses/Provenance/`, so supporting historical
 videos cannot enter the canonical Viewer accidentally.
 
+The dated `Standard_Time_Lapses/Provenance/2026-08-27/` layer contains a
+27-row, 15-field relationship sidecar and five nested noncanonical InShot
+derivatives. Neither the sidecar nor those derivative payloads define a Viewer
+configuration or contribute to the 513 active rows.
+
 ```yaml
 configs:
 - config_name: canonical
@@ -34,22 +39,25 @@ configs:
     - Pre_Standard_Time_Lapses/*.mp4
 ```
 
-The two configurations share the same declared 29-field schema. Both tiers now
-have complete core encoded-video metadata, stable IDs, content hashes, and byte
-sizes. Historical descriptive and provenance uncertainty remains explicit in
-the Pre-Standard tier.
+The two configurations share the same declared 29-field schema. Before merge,
+both tiers must have complete core encoded-video metadata, stable IDs, content
+hashes, and byte sizes. Historical descriptive and provenance uncertainty
+remains explicit in the Pre-Standard tier.
 
 ## Merge criteria
 
 Merge only after the pull-request preview confirms:
 
-1. `canonical/archive` contains exactly 360 rows.
+1. `canonical/archive` contains exactly 385 rows.
 2. `pre_standard/archive` contains exactly 128 rows.
-3. No provenance video is present in either configuration.
+3. No provenance video, including the five dated InShot derivatives, is
+   present in either configuration.
 4. Every expected row contains its metadata.
 5. Stored dimensions and byte sizes load as integers.
 6. `has_audio` loads as a boolean.
 7. Generated Parquet artifacts succeed for both configurations.
+8. The 27 relationship rows resolve against the exact immutable
+   `source_hub_revision`, while remaining outside both Viewer configurations.
 
 ## Split terminology
 

metadata.csv

@@ -362,3 +362,25 @@ Standard_Time_Lapses/2026-08-19.1208.Pencil.Graphite.FountainPen.Ink.Paper.14x17
 Standard_Time_Lapses/2026-08-22.0124.BallpointPen.Ink.Paper.14x17.Rec01.mp4,tla-1b502d1a39e190f8,standard,true,standard-2025-07-13,2026-08-22,01:24,BallpointPen,Ink,Paper,14x17,1280.185999,2160,3840,portrait,60.0,h264,yuv420p,mp4,True,1d5dbe1b572f21330aefe212824d9784385b7444467724e0a1404ad16a392b5f,,direct_root_upload,,,manual_confirmation,,16768134326,"Creator-submitted first recording in a RecNN sequence on 14x17 paper. Visual spot-check confirms an early-stage start and continuous drawing progression. Rec02 continues the same work; Rec03 is expected. All 76,811 video frames and the audio stream decoded successfully. RecNN distinguishes recording sequence only."
 Standard_Time_Lapses/2026-08-22.1613.BallpointPen.Ink.Paper.14x17.Rec02.mp4,tla-3366e26036caab29,standard,true,standard-2025-07-13,2026-08-22,16:13,BallpointPen,Ink,Paper,14x17,1238.452999,2160,3840,portrait,60.0,h264,yuv420p,mp4,True,583d865e50d74ccaa881c2d15d8e3be0b5edd0810803e42f0e51475a89c674fc,,direct_root_upload,,,manual_confirmation,,16222497912,"Creator-submitted second recording in a RecNN sequence on 14x17 paper. Visual spot-check confirms direct continuity from Rec01 and further drawing progression. Rec03 is expected; a sequence endpoint is not claimed. All 74,307 video frames and the audio stream decoded successfully. RecNN distinguishes recording sequence only. Less than one minute of this session was accidentally not recorded."
 Standard_Time_Lapses/2026-08-23.1932.BallpointPen.Ink.Paper.14x17.Rec03.mp4,tla-793ae81230693d67,standard,true,standard-2025-07-13,2026-08-23,19:32,BallpointPen,Ink,Paper,14x17,1376.751999,2160,3840,portrait,60.0,h264,yuv420p,mp4,True,4a6c0605b1cdec7dc02f190534d1c6f34e0790172b30366ca0d9584c134ba75b,,direct_root_upload,,,manual_confirmation,,18032164087,"Creator-submitted third recording in a RecNN sequence on 14x17 paper. Visual review confirms direct continuity from Rec02 and continued drawing progression. The creator-confirmed ink transition occurs at approximately 00:04:59: the standard Pelikan 337 black refill is used before visible refill handling, and an unmarked, unknown-brand black refill is used afterward. All 82,605 video frames and the audio stream decoded successfully. Combined-stream FFmpeg validation produced one end-of-stream non-monotonic DTS warning from the null output; source packet and decoded-frame timestamps at the tail remained strictly increasing. RecNN distinguishes recording sequence only; no endpoint is inferred from the suffix."
+Standard_Time_Lapses/2026-08-24.0157.BallpointPen.Ink.Paper.9x12.Rec01.mp4,tla-46790887b96058b1,standard,true,standard-2025-07-13,2026-08-24,01:57,BallpointPen,Ink,Paper,9x12,289.8304,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,9e03ad7118d219f39dbb0d3984e19138fba339b3c5e641c4e80e8853ddad0032,VID_20260823_233143.mp4,direct_root_upload,,,manual_confirmation,,1477139910,"Creator-confirmed untouched Framelapse source fragment 1 of 2 in an owner-confirmed complete drawing sequence. Original filename: VID_20260823_233143.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 8,695 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-24.0157.BallpointPen.Ink.Paper.9x12.Rec02.mp4,tla-ebbce867454d61ea,standard,true,standard-2025-07-13,2026-08-24,01:57,BallpointPen,Ink,Paper,9x12,186.164789,3840,2160,landscape,30.000303,hevc,yuvj420p,mp4,False,7a865fbd9b04da1f0095f8252a1156948c0041335d6d89a977ee1d4eac3db6e5,VID_20260824_013639.mp4,direct_root_upload,,,manual_confirmation,,949451606,"Creator-confirmed untouched Framelapse source fragment 2 of 2 in an owner-confirmed complete drawing sequence. Original filename: VID_20260824_013639.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 5,585 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-24.0638.BallpointPen.Ink.Paper.12x9.Rec01.mp4,tla-e31f5059a75da52c,standard,true,standard-2025-07-13,2026-08-24,06:38,BallpointPen,Ink,Paper,12x9,172.7316,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,c5dae55bd92f2b2e4d16ca7592d549079f01dbb4cf7e0a0896421ed977f4ae90,VID_20260824_044026.mp4,direct_root_upload,,,manual_confirmation,,880728360,"Creator-confirmed untouched Framelapse source fragment 1 of 2 in an owner-confirmed complete drawing sequence. Original filename: VID_20260824_044026.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 5,182 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-24.0638.BallpointPen.Ink.Paper.12x9.Rec02.mp4,tla-e6314ca067353edc,standard,true,standard-2025-07-13,2026-08-24,06:38,BallpointPen,Ink,Paper,12x9,174.798256,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,3627316fdfb476685660199e6ee62cc14ca8f8a91d15608cfed669d678f10484,VID_20260824_061839.mp4,direct_root_upload,,,manual_confirmation,,891207279,"Creator-confirmed untouched Framelapse source fragment 2 of 2 in an owner-confirmed complete drawing sequence. Original filename: VID_20260824_061839.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 5,244 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-25.1941.BallpointPen.Ink.Paper.9x12.Rec01.mp4,tla-2b3cc71f11ea0151,standard,true,standard-2025-07-13,2026-08-25,19:41,BallpointPen,Ink,Paper,9x12,86.8991,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,8c4e0fc28f7d68ca50b5027dc1a8576643e07b2ff68809409afb14ec48974854,VID_20260824_074143.mp4,direct_root_upload,,,manual_confirmation,,535577333,"Creator-confirmed untouched Framelapse source fragment 1 of 6 in an owner-confirmed complete drawing sequence. Original filename: VID_20260824_074143.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 2,607 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-25.1941.BallpointPen.Ink.Paper.9x12.Rec02.mp4,tla-3a4ed6625d6aae32,standard,true,standard-2025-07-13,2026-08-25,19:41,BallpointPen,Ink,Paper,9x12,185.8648,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,d827e2e658d4734fa6e706de70f6e9cd14960d73574edafee94f3730cadbc6f1,VID_20260824_090248.mp4,direct_root_upload,,,manual_confirmation,,946694929,"Creator-confirmed untouched Framelapse source fragment 2 of 6 in an owner-confirmed complete drawing sequence. Original filename: VID_20260824_090248.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 5,576 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-25.1941.BallpointPen.Ink.Paper.9x12.Rec03.mp4,tla-08603b7d034d579a,standard,true,standard-2025-07-13,2026-08-25,19:41,BallpointPen,Ink,Paper,9x12,314.3635,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,bc72f282fd2b50ace4d3e194680490ec3fbac195e8ffbda40e817baab10ab58b,VID_20260825_145801.mp4,direct_root_upload,,,manual_confirmation,,1603681390,"Creator-confirmed untouched Framelapse source fragment 3 of 6 in an owner-confirmed complete drawing sequence. Original filename: VID_20260825_145801.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 9,431 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-25.1941.BallpointPen.Ink.Paper.9x12.Rec04.mp4,tla-d743accc0cc418b4,standard,true,standard-2025-07-13,2026-08-25,19:41,BallpointPen,Ink,Paper,9x12,61.699378,3840,2160,landscape,30.000297,hevc,yuvj420p,mp4,False,fd78e118f24269ff7a879c8e2e40cbc5b9a2c0c2f111e0d19abea877648fce6d,VID_20260825_160133.mp4,direct_root_upload,,,manual_confirmation,,315155575,"Creator-confirmed untouched Framelapse source fragment 4 of 6 in an owner-confirmed complete drawing sequence. Original filename: VID_20260825_160133.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 1,851 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-25.1941.BallpointPen.Ink.Paper.9x12.Rec05.mp4,tla-dab77d429267838b,standard,true,standard-2025-07-13,2026-08-25,19:41,BallpointPen,Ink,Paper,9x12,140.5319,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,3da1e9d6856b7b7f248d1275a061f0e1c4cf48439cc2a4483415dcf5e9b0e4cb,VID_20260825_162129.mp4,direct_root_upload,,,manual_confirmation,,716336962,"Creator-confirmed untouched Framelapse source fragment 5 of 6 in an owner-confirmed complete drawing sequence. Original filename: VID_20260825_162129.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 4,216 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-25.1941.BallpointPen.Ink.Paper.9x12.Rec06.mp4,tla-d611b60118251c73,standard,true,standard-2025-07-13,2026-08-25,19:41,BallpointPen,Ink,Paper,9x12,248.0975,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,3a9657c92c4e5d8317fc57a61a311480c097576cba12bd0007cceffddd129366,VID_20260825_191231.mp4,direct_root_upload,,,manual_confirmation,,1265415074,"Creator-confirmed untouched Framelapse source fragment 6 of 6 in an owner-confirmed complete drawing sequence. Original filename: VID_20260825_191231.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 7,443 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-26.1229.BallpointPen.Ink.Paper.9x12.Rec01.mp4,tla-bbb65ede9e37e03c,standard,true,standard-2025-07-13,2026-08-26,12:29,BallpointPen,Ink,Paper,9x12,193.8314,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,cd97f7221cb09dd35460321fae78563a879e6659b92061cab0dc4be9ab4e38b8,VID_20260826_113641.mp4,direct_root_upload,,,manual_confirmation,,987970571,"Creator-confirmed untouched Framelapse source fragment 1 of 2 in an owner-confirmed complete drawing sequence. Original filename: VID_20260826_113641.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 5,815 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-26.1229.BallpointPen.Ink.Paper.9x12.Rec02.mp4,tla-3adf012f9f23d1d4,standard,true,standard-2025-07-13,2026-08-26,12:29,BallpointPen,Ink,Paper,9x12,58.3994,3840,2160,landscape,30.000308,hevc,yuvj420p,mp4,False,a3f7b26ce81b790c6d7b5b2252d68e96ba58e958e415429bc659d42d809fd84b,VID_20260826_122231.mp4,direct_root_upload,,,manual_confirmation,,297678377,"Creator-confirmed untouched Framelapse source fragment 2 of 2 in an owner-confirmed complete drawing sequence. Original filename: VID_20260826_122231.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 1,752 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec01.mp4,tla-db8e5247b8ffbfcd,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,73.199267,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,bbd95099782667a1edce6dff3a7260a9f9a892e9db680a61bba8daa504271e5f,VID_20260826_124754.mp4,direct_root_upload,,,manual_confirmation,,376030826,"Creator-confirmed untouched Framelapse source fragment 1 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260826_124754.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 2,196 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec02.mp4,tla-f4659f0da42cf8e6,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,89.4324,3840,2160,landscape,30.000298,hevc,yuvj420p,mp4,False,d85c1b1bed94be6b2ce75661733b47e4ce6fc385cd63a14edc3c64ca4d165750,VID_20260826_130112.mp4,direct_root_upload,,,manual_confirmation,,455422073,"Creator-confirmed untouched Framelapse source fragment 2 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260826_130112.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 2,683 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec03.mp4,tla-d985c298e56b626b,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,94.699056,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,1c021b34fe0f0a447828444cac4e827e04c8643d59cd207f11bc34103356359a,VID_20260826_135332.mp4,direct_root_upload,,,manual_confirmation,,482916549,"Creator-confirmed untouched Framelapse source fragment 3 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260826_135332.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 2,841 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec04.mp4,tla-8d4e89f78b6cfb9d,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,131.532,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,36369030b39a1f229b9374c556b04e72c01110ccde38e24df3f19cf13dfa31bf,VID_20260826_152231.mp4,direct_root_upload,,,manual_confirmation,,671007948,"Creator-confirmed untouched Framelapse source fragment 4 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260826_152231.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 3,946 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec05.mp4,tla-06b42c49789802b4,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,120.0321,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,bf912604ec65aeaaa2f374c9184b694437bb4187e6416893ce2c75bde7c51b62,VID_20260827_044715.mp4,direct_root_upload,,,manual_confirmation,,611828108,"Creator-confirmed untouched Framelapse source fragment 5 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260827_044715.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 3,601 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec06.mp4,tla-10c744cb86d89256,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,188.5981,3840,2160,landscape,30.0003,hevc,yuvj420p,mp4,False,1d8b048951088fed34d6b805764aa7314d83ba0d4f5a18a8574b7f802c4253c6,VID_20260827_053657.mp4,direct_root_upload,,,manual_confirmation,,961633726,"Creator-confirmed untouched Framelapse source fragment 6 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260827_053657.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 5,658 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec07.mp4,tla-56d81a0cc1a81233,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,269.5306,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,1fda631fc1f95434ed82bcee298d11973692f4f99ce48286966ee6632bf92d66,VID_20260827_063456.mp4,direct_root_upload,,,manual_confirmation,,1374513851,"Creator-confirmed untouched Framelapse source fragment 7 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260827_063456.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 8,086 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec08.mp4,tla-dfeb6702936333a5,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,135.931978,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,e048c6b2cd89bf9646ee2dc2a3d169e8e8294f02589a037eebea0c1b216da4ca,VID_20260827_073057.mp4,direct_root_upload,,,manual_confirmation,,693672127,"Creator-confirmed untouched Framelapse source fragment 8 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260827_073057.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 4,078 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec09.mp4,tla-3e01cce98d9d3ff3,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,111.9322,3840,2160,landscape,30.000301,hevc,yuvj420p,mp4,False,0e37c7c81b3faf912278effb85cb0f90fcb9005b49a8550b53d2ccf7474c47be,VID_20260827_080100.mp4,direct_root_upload,,,manual_confirmation,,571159447,"Creator-confirmed untouched Framelapse source fragment 9 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260827_080100.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 3,358 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."
+Standard_Time_Lapses/2026-08-27.0856.BallpointPen.Ink.Paper.9x12.Rec10.mp4,tla-e1c799958f3cf010,standard,true,standard-2025-07-13,2026-08-27,08:56,BallpointPen,Ink,Paper,9x12,63.599367,3840,2160,landscape,30.000299,hevc,yuvj420p,mp4,False,5e61e7002af524f3b999e9144248bdee65818f4dc0342c23d4cf3d7203e1c018,VID_20260827_084919.mp4,direct_root_upload,,,manual_confirmation,,324653034,"Creator-confirmed untouched Framelapse source fragment 10 of 10 in an owner-confirmed complete drawing sequence. Original filename: VID_20260827_084919.mp4. Local SHA-256 matched the independent transfer baseline before upload. Complete packet-stream demux and sampled start/middle/end decoding passed on 2026-08-27; the container reports 1,908 video frames. Stored as 3840x2160 landscape HEVC with -90-degree display rotation. RecNN records sequence only."

tools/capture_hub_inventory.py

@@ -1,16 +1,20 @@
 #!/usr/bin/env python3
-"""Augment a pinned Hub repository inventory with Xet file identities.
+"""Augment a pinned Hub inventory with Xet and validation-file identities.
 
 The ordinary Hub repository response contains file paths, sizes, and
 LFS-compatible SHA-256 values. A non-following request to each resolve URL also
 returns the Xet file ID used by this dataset's ``hub_xet_hash`` field. Only
-response headers are requested; file payloads are not intentionally fetched.
+response headers are requested for media payloads. Small validation files such
+as ``metadata.csv`` are fetched with a byte cap and recorded under
+``validationFiles`` so downstream joins can be bound to exact revision bytes.
 """
 
 from __future__ import annotations
 
 import argparse
+import hashlib
 import json
+import re
 import time
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from pathlib import Path
@@ -24,6 +28,25 @@ class NoRedirect(HTTPRedirectHandler):
         return None
 
 
+class CommitTrackingRedirect(HTTPRedirectHandler):
+    """Follow redirects while retaining revision headers from each response."""
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.repo_commits: list[str] = []
+
+    def redirect_request(self, req, fp, code, msg, headers, newurl):  # noqa: ANN001
+        repo_commit = headers.get("X-Repo-Commit")
+        if repo_commit:
+            self.repo_commits.append(repo_commit)
+        return super().redirect_request(req, fp, code, msg, headers, newurl)
+
+
+REVISION_RE = re.compile(r"^[0-9a-f]{40}$")
+READ_CHUNK_BYTES = 1024 * 1024
+DEFAULT_VALIDATION_FILE_MAX_BYTES = 64 * 1024 * 1024
+
+
 def clean_etag(value: str | None) -> str:
     return (value or "").strip().strip('"')
 
@@ -66,6 +89,88 @@ def read_identity(url: str, timeout: int, retries: int) -> dict[str, object]:
     raise RuntimeError(str(last_error or "unable to read resolve headers"))
 
 
+def read_validation_file(
+    url: str,
+    expected_revision: str,
+    timeout: int,
+    retries: int,
+    max_bytes: int,
+) -> dict[str, object]:
+    """Hash one small exact-revision repository file without content decoding."""
+
+    if max_bytes <= 0:
+        raise ValueError("validation-file byte cap must be positive")
+
+    last_error: Exception | None = None
+    for attempt in range(retries + 1):
+        redirect_handler = CommitTrackingRedirect()
+        opener = build_opener(redirect_handler)
+        request = Request(
+            url,
+            method="GET",
+            headers={"Accept-Encoding": "identity"},
+        )
+        try:
+            with opener.open(request, timeout=timeout) as response:
+                headers = response.headers
+                content_encoding = (headers.get("Content-Encoding") or "identity").lower()
+                if content_encoding != "identity":
+                    raise ValueError(
+                        f"validation-file response used content encoding {content_encoding!r}"
+                    )
+
+                content_length_text = headers.get("Content-Length")
+                if content_length_text is None:
+                    raise ValueError("validation-file response omitted Content-Length")
+                try:
+                    content_length = int(content_length_text)
+                except ValueError as exc:
+                    raise ValueError("validation-file Content-Length is not an integer") from exc
+                if content_length < 0:
+                    raise ValueError("validation-file Content-Length is negative")
+                if content_length > max_bytes:
+                    raise ValueError(
+                        f"validation file exceeds {max_bytes}-byte safety cap"
+                    )
+
+                observed_commits = list(redirect_handler.repo_commits)
+                final_commit = headers.get("X-Repo-Commit")
+                if final_commit:
+                    observed_commits.append(final_commit)
+                if not observed_commits:
+                    raise ValueError("validation-file response omitted X-Repo-Commit")
+                if any(commit != expected_revision for commit in observed_commits):
+                    raise ValueError(
+                        "validation-file response came from a different revision"
+                    )
+
+                digest = hashlib.sha256()
+                size = 0
+                while chunk := response.read(READ_CHUNK_BYTES):
+                    size += len(chunk)
+                    if size > max_bytes:
+                        raise ValueError(
+                            f"validation file exceeds {max_bytes}-byte safety cap"
+                        )
+                    digest.update(chunk)
+                if size != content_length:
+                    raise ValueError(
+                        "validation-file byte count differs from Content-Length"
+                    )
+                return {
+                    "sha256": digest.hexdigest(),
+                    "size": size,
+                    "repoCommit": expected_revision,
+                }
+        except (HTTPError, URLError, OSError, ValueError) as exc:
+            last_error = exc
+
+        if attempt < retries:
+            time.sleep(0.5 * (attempt + 1))
+
+    raise RuntimeError(str(last_error or "unable to read validation file"))
+
+
 def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument("--repo-json", type=Path, required=True)
@@ -76,12 +181,35 @@ def main() -> None:
     parser.add_argument("--workers", type=int, default=12)
     parser.add_argument("--timeout", type=int, default=30)
     parser.add_argument("--retries", type=int, default=2)
+    parser.add_argument(
+        "--validation-file",
+        action="append",
+        dest="validation_files",
+        help="small repository file to bind by exact bytes (default: metadata.csv)",
+    )
+    parser.add_argument(
+        "--validation-file-max-bytes",
+        type=int,
+        default=DEFAULT_VALIDATION_FILE_MAX_BYTES,
+    )
     args = parser.parse_args()
 
     inventory = json.loads(args.repo_json.read_text(encoding="utf-8"))
     siblings = inventory.get("siblings") if isinstance(inventory, dict) else None
     if not isinstance(siblings, list):
         raise SystemExit("repository JSON must contain a siblings list")
+    if not REVISION_RE.fullmatch(args.revision):
+        raise SystemExit("revision must be an immutable 40-hex commit")
+    if inventory.get("sha") != args.revision:
+        raise SystemExit("repository JSON commit differs from --revision")
+    if args.validation_file_max_bytes <= 0:
+        raise SystemExit("--validation-file-max-bytes must be positive")
+
+    siblings_by_path = {
+        item["rfilename"]: item
+        for item in siblings
+        if isinstance(item, dict) and isinstance(item.get("rfilename"), str)
+    }
 
     targets: list[tuple[dict[str, object], str, str]] = []
     for item in siblings:
@@ -128,11 +256,59 @@ def main() -> None:
         print(json.dumps({"failures": failures}, indent=2))
         raise SystemExit(1)
 
+    validation_paths = args.validation_files or ["metadata.csv"]
+    if len(validation_paths) != len(set(validation_paths)):
+        raise SystemExit("validation-file paths must be unique")
+    validation_files: dict[str, dict[str, object]] = {}
+    for path in validation_paths:
+        if (
+            not path
+            or path.startswith("/")
+            or "\\" in path
+            or any(part in {"", ".", ".."} for part in path.split("/"))
+        ):
+            raise SystemExit(f"invalid validation-file repository path: {path!r}")
+        sibling = siblings_by_path.get(path)
+        if sibling is None:
+            raise SystemExit(f"validation file is absent from repository JSON: {path}")
+        encoded_path = quote(path, safe="/")
+        url = (
+            f"https://huggingface.co/datasets/{args.repo_id}/"
+            f"resolve/{args.revision}/{encoded_path}"
+        )
+        try:
+            receipt = read_validation_file(
+                url,
+                args.revision,
+                args.timeout,
+                args.retries,
+                args.validation_file_max_bytes,
+            )
+        except Exception as exc:  # noqa: BLE001
+            raise SystemExit(f"unable to bind validation file {path}: {exc}") from exc
+        sibling_size = sibling.get("size")
+        if sibling_size is not None and int(sibling_size) != receipt["size"]:
+            raise SystemExit(
+                f"validation file size differs from repository JSON: {path}"
+            )
+        validation_files[path] = receipt
+
+    inventory["validationFiles"] = validation_files
+
     args.output.parent.mkdir(parents=True, exist_ok=True)
     args.output.write_text(
         json.dumps(inventory, indent=2, sort_keys=True) + "\n", encoding="utf-8"
     )
-    print(json.dumps({"resolved_files": len(targets), "output": str(args.output)}, indent=2))
+    print(
+        json.dumps(
+            {
+                "resolved_files": len(targets),
+                "validation_files": sorted(validation_files),
+                "output": str(args.output),
+            },
+            indent=2,
+        )
+    )
 
 
 if __name__ == "__main__":

tools/test_inventory_binding.py

@@ -0,0 +1,360 @@
+#!/usr/bin/env python3
+"""Self-contained tests for exact-revision validation-file binding."""
+
+from __future__ import annotations
+
+import csv
+import hashlib
+import importlib.util
+import json
+import subprocess
+import sys
+import tempfile
+import threading
+import unittest
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
+from pathlib import Path
+from types import ModuleType
+
+
+TOOLS = Path(__file__).resolve().parent
+REVISION = "a" * 40
+OTHER_REVISION = "b" * 40
+PAYLOAD = b"file_name,record_id\nexample.mp4,tla-0123456789abcdef\n"
+
+
+def load_module(name: str, path: Path) -> ModuleType:
+    spec = importlib.util.spec_from_file_location(name, path)
+    if spec is None or spec.loader is None:
+        raise RuntimeError(f"unable to load {path}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+capture = load_module("capture_hub_inventory", TOOLS / "capture_hub_inventory.py")
+relationships = load_module(
+    "validate_fragment_relationships",
+    TOOLS / "validate_fragment_relationships.py",
+)
+
+
+class FixtureHandler(BaseHTTPRequestHandler):
+    protocol_version = "HTTP/1.1"
+
+    def do_GET(self) -> None:  # noqa: N802
+        if self.headers.get("Accept-Encoding") != "identity":
+            self.send_error(400, "identity content encoding required")
+            return
+        if self.path == "/resolve":
+            self.send_response(302)
+            self.send_header("Location", f"http://127.0.0.1:{self.server.server_port}/payload")
+            self.send_header("X-Repo-Commit", REVISION)
+            self.send_header("Content-Length", "0")
+            self.end_headers()
+            return
+        if self.path == "/wrong-commit":
+            self.send_response(200)
+            self.send_header("X-Repo-Commit", OTHER_REVISION)
+            self.send_header("Content-Length", str(len(PAYLOAD)))
+            self.end_headers()
+            self.wfile.write(PAYLOAD)
+            return
+        if self.path == "/payload":
+            self.send_response(200)
+            self.send_header("Content-Encoding", "identity")
+            self.send_header("Content-Length", str(len(PAYLOAD)))
+            self.end_headers()
+            self.wfile.write(PAYLOAD)
+            return
+        self.send_error(404)
+
+    def log_message(self, format: str, *args: object) -> None:
+        del format, args
+
+
+class InventoryBindingTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        cls.server = ThreadingHTTPServer(("127.0.0.1", 0), FixtureHandler)
+        cls.thread = threading.Thread(target=cls.server.serve_forever, daemon=True)
+        cls.thread.start()
+        cls.base_url = f"http://127.0.0.1:{cls.server.server_port}"
+
+    @classmethod
+    def tearDownClass(cls) -> None:
+        cls.server.shutdown()
+        cls.server.server_close()
+        cls.thread.join(timeout=5)
+
+    def test_capture_records_exact_byte_receipt_across_redirect(self) -> None:
+        receipt = capture.read_validation_file(
+            f"{self.base_url}/resolve",
+            REVISION,
+            timeout=5,
+            retries=0,
+            max_bytes=1024,
+        )
+        self.assertEqual(set(receipt), {"sha256", "size", "repoCommit"})
+        self.assertEqual(receipt["size"], len(PAYLOAD))
+        self.assertEqual(receipt["repoCommit"], REVISION)
+
+    def test_capture_rejects_wrong_commit_and_oversize_body(self) -> None:
+        with self.assertRaises(RuntimeError):
+            capture.read_validation_file(
+                f"{self.base_url}/wrong-commit",
+                REVISION,
+                timeout=5,
+                retries=0,
+                max_bytes=1024,
+            )
+        with self.assertRaises(RuntimeError):
+            capture.read_validation_file(
+                f"{self.base_url}/resolve",
+                REVISION,
+                timeout=5,
+                retries=0,
+                max_bytes=len(PAYLOAD) - 1,
+            )
+
+    def test_validator_requires_matching_hash_size_and_commit(self) -> None:
+        receipt = capture.read_validation_file(
+            f"{self.base_url}/resolve",
+            REVISION,
+            timeout=5,
+            retries=0,
+            max_bytes=1024,
+        )
+        inventory = {"validationFiles": {"metadata.csv": receipt}}
+        with tempfile.TemporaryDirectory(prefix="tla-binding-test-") as temp_dir:
+            metadata = Path(temp_dir) / "metadata.csv"
+            metadata.write_bytes(PAYLOAD)
+            errors: list[str] = []
+            relationships.validate_pinned_metadata(
+                inventory,
+                metadata,
+                REVISION,
+                errors,
+            )
+            self.assertEqual(errors, [])
+
+            metadata.write_bytes(PAYLOAD + b"tampered")
+            errors = []
+            relationships.validate_pinned_metadata(
+                inventory,
+                metadata,
+                REVISION,
+                errors,
+            )
+            self.assertTrue(any("differs" in error for error in errors))
+
+            errors = []
+            relationships.validate_pinned_metadata(
+                inventory,
+                metadata,
+                OTHER_REVISION,
+                errors,
+            )
+            self.assertTrue(any("source_hub_revision" in error for error in errors))
+
+    def test_validator_requires_top_level_inventory_revision(self) -> None:
+        errors: list[str] = []
+        relationships.validate_inventory_revision(
+            {"sha": REVISION},
+            REVISION,
+            errors,
+        )
+        self.assertEqual(errors, [])
+        relationships.validate_inventory_revision(
+            {"sha": OTHER_REVISION},
+            REVISION,
+            errors,
+        )
+        self.assertTrue(any("inventory commit" in error for error in errors))
+
+    def test_full_relationship_validator_accepts_only_bound_metadata(self) -> None:
+        metadata_fields = ["file_name", "record_id", "hub_xet_hash"]
+        metadata_rows: list[dict[str, str]] = []
+        relationship_rows: list[dict[str, str]] = []
+        canonical_by_set: dict[str, list[str]] = {}
+        record_counter = 1
+        for group_index, cardinality in enumerate((2, 2, 2, 6, 10), start=1):
+            set_label = (
+                f"2026-08-{20 + group_index:02d}.000{group_index}."
+                "BallpointPen.Ink.Paper.9x12"
+            )
+            canonical_by_set[set_label] = []
+            for position in range(1, cardinality + 1):
+                record_id = f"tla-{record_counter:016x}"
+                record_counter += 1
+                file_path = (
+                    f"Standard_Time_Lapses/{set_label}.Rec{position:02d}.mp4"
+                )
+                xet_hash = hashlib.sha256(
+                    f"fixture-xet:{file_path}".encode("utf-8")
+                ).hexdigest()
+                metadata_rows.append(
+                    {
+                        "file_name": file_path,
+                        "record_id": record_id,
+                        "hub_xet_hash": xet_hash,
+                    }
+                )
+                canonical_by_set[set_label].append(record_id)
+                relationship_rows.append(
+                    {
+                        "fragment_set_label": set_label,
+                        "object_role": "canonical_fragment",
+                        "record_id": record_id,
+                        "file_path": file_path,
+                        "sha256": hashlib.sha256(
+                            f"fixture-sha:{file_path}".encode("utf-8")
+                        ).hexdigest(),
+                        "hub_xet_hash": xet_hash,
+                        "size_bytes": str(1000 + record_counter),
+                        "sequence_position": str(position),
+                        "sequence_count": str(cardinality),
+                        "sequence_completeness": "owner_confirmed_complete",
+                        "source_record_ids": "",
+                        "derivative_coverage": "",
+                        "evidence_state": (
+                            "owner-confirmed; boundary-frame-verified; "
+                            "checksum-computed; media-probed; demux-verified; "
+                            "sampled-decode-verified"
+                        ),
+                        "source_hub_revision": REVISION,
+                        "notes": "",
+                    }
+                )
+
+        set_labels = list(canonical_by_set)
+        derivative_specs = [
+            (set_labels[0], canonical_by_set[set_labels[0]], "complete_sequence"),
+            (set_labels[1], canonical_by_set[set_labels[1]], "complete_sequence"),
+            (set_labels[2], canonical_by_set[set_labels[2]][1:2], "partial_sequence"),
+            (set_labels[2], canonical_by_set[set_labels[2]][1:2], "partial_sequence"),
+            (set_labels[1], canonical_by_set[set_labels[1]], "complete_sequence"),
+        ]
+        for derivative_index, (set_label, source_ids, coverage) in enumerate(
+            derivative_specs,
+            start=1,
+        ):
+            file_path = (
+                "Standard_Time_Lapses/Provenance/2026-08-27/InShot/"
+                f"fixture-{derivative_index}.mp4"
+            )
+            relationship_rows.append(
+                {
+                    "fragment_set_label": set_label,
+                    "object_role": "noncanonical_inshot_derivative",
+                    "record_id": "",
+                    "file_path": file_path,
+                    "sha256": hashlib.sha256(
+                        f"fixture-sha:{file_path}".encode("utf-8")
+                    ).hexdigest(),
+                    "hub_xet_hash": hashlib.sha256(
+                        f"fixture-xet:{file_path}".encode("utf-8")
+                    ).hexdigest(),
+                    "size_bytes": str(2000 + derivative_index),
+                    "sequence_position": "",
+                    "sequence_count": str(len(canonical_by_set[set_label])),
+                    "sequence_completeness": "owner_confirmed_complete",
+                    "source_record_ids": ";".join(source_ids),
+                    "derivative_coverage": coverage,
+                    "evidence_state": (
+                        "sampled-frame-verified; duration-arithmetic-verified; "
+                        "checksum-computed; media-probed; demux-verified; "
+                        "sampled-decode-verified"
+                    ),
+                    "source_hub_revision": REVISION,
+                    "notes": "",
+                }
+            )
+
+        self.assertEqual(len(metadata_rows), 22)
+        self.assertEqual(len(relationship_rows), 27)
+
+        with tempfile.TemporaryDirectory(prefix="tla-validator-test-") as temp_dir:
+            temp = Path(temp_dir)
+            metadata_path = temp / "metadata.csv"
+            relationships_path = temp / "relationships.csv"
+            inventory_path = temp / "inventory.json"
+            with metadata_path.open("w", encoding="utf-8", newline="") as handle:
+                writer = csv.DictWriter(
+                    handle,
+                    fieldnames=metadata_fields,
+                    lineterminator="\n",
+                )
+                writer.writeheader()
+                writer.writerows(metadata_rows)
+            with relationships_path.open("w", encoding="utf-8", newline="") as handle:
+                writer = csv.DictWriter(
+                    handle,
+                    fieldnames=relationships.FIELDS,
+                    lineterminator="\n",
+                )
+                writer.writeheader()
+                writer.writerows(relationship_rows)
+
+            metadata_bytes = metadata_path.read_bytes()
+            inventory = {
+                "sha": REVISION,
+                "siblings": [
+                    {
+                        "rfilename": row["file_path"],
+                        "size": int(row["size_bytes"]),
+                        "lfs": {
+                            "size": int(row["size_bytes"]),
+                            "sha256": row["sha256"],
+                        },
+                        "xetHash": row["hub_xet_hash"],
+                        "repoCommit": REVISION,
+                    }
+                    for row in relationship_rows
+                ],
+                "validationFiles": {
+                    "metadata.csv": {
+                        "sha256": hashlib.sha256(metadata_bytes).hexdigest(),
+                        "size": len(metadata_bytes),
+                        "repoCommit": REVISION,
+                    }
+                },
+            }
+            inventory_path.write_text(
+                json.dumps(inventory),
+                encoding="utf-8",
+            )
+
+            command = [
+                sys.executable,
+                str(TOOLS / "validate_fragment_relationships.py"),
+                "--relationships",
+                str(relationships_path),
+                "--metadata",
+                str(metadata_path),
+                "--repo-inventory-json",
+                str(inventory_path),
+            ]
+            completed = subprocess.run(
+                command,
+                check=False,
+                capture_output=True,
+                text=True,
+                encoding="utf-8",
+            )
+            self.assertEqual(completed.returncode, 0, completed.stdout + completed.stderr)
+
+            metadata_path.write_bytes(metadata_bytes + b"\n")
+            completed = subprocess.run(
+                command,
+                check=False,
+                capture_output=True,
+                text=True,
+                encoding="utf-8",
+            )
+            self.assertNotEqual(completed.returncode, 0)
+            self.assertIn("differs from the pinned repository", completed.stdout)
+
+
+if __name__ == "__main__":
+    unittest.main()

tools/validate_fragment_relationships.py

@@ -0,0 +1,328 @@
+#!/usr/bin/env python3
+"""Validate a fragment relationship manifest against pinned metadata bytes."""
+
+from __future__ import annotations
+
+import argparse
+import csv
+import hashlib
+import json
+import re
+from collections import defaultdict
+from pathlib import Path
+
+
+FIELDS = [
+    "fragment_set_label",
+    "object_role",
+    "record_id",
+    "file_path",
+    "sha256",
+    "hub_xet_hash",
+    "size_bytes",
+    "sequence_position",
+    "sequence_count",
+    "sequence_completeness",
+    "source_record_ids",
+    "derivative_coverage",
+    "evidence_state",
+    "source_hub_revision",
+    "notes",
+]
+HASH_RE = re.compile(r"^[0-9a-f]{64}$")
+REVISION_RE = re.compile(r"^[0-9a-f]{40}$")
+RECORD_RE = re.compile(r"^tla-[0-9a-f]{16}$")
+EVIDENCE_BY_ROLE = {
+    "canonical_fragment": {
+        "owner-confirmed",
+        "boundary-frame-verified",
+        "checksum-computed",
+        "media-probed",
+        "demux-verified",
+        "sampled-decode-verified",
+    },
+    "noncanonical_inshot_derivative": {
+        "sampled-frame-verified",
+        "duration-arithmetic-verified",
+        "checksum-computed",
+        "media-probed",
+        "demux-verified",
+        "sampled-decode-verified",
+    },
+}
+
+
+def read_csv(path: Path) -> tuple[list[str], list[dict[str, str]]]:
+    with path.open("r", encoding="utf-8-sig", newline="") as handle:
+        reader = csv.DictReader(handle)
+        if not reader.fieldnames:
+            raise ValueError(f"missing CSV header: {path}")
+        return list(reader.fieldnames), list(reader)
+
+
+def validate_pinned_metadata(
+    inventory: dict[str, object],
+    metadata_path: Path,
+    declared_revision: str,
+    errors: list[str],
+) -> None:
+    """Bind the local metadata join to exact bytes captured at one Hub commit."""
+
+    validation_files = inventory.get("validationFiles")
+    if not isinstance(validation_files, dict):
+        errors.append("repository inventory lacks validationFiles receipts")
+        return
+    remote_metadata = validation_files.get("metadata.csv")
+    if not isinstance(remote_metadata, dict):
+        errors.append(
+            "repository inventory lacks validationFiles metadata.csv receipt"
+        )
+        return
+
+    remote_hash = remote_metadata.get("sha256")
+    remote_size = remote_metadata.get("size")
+    remote_commit = remote_metadata.get("repoCommit")
+    if not isinstance(remote_hash, str) or not HASH_RE.fullmatch(remote_hash):
+        errors.append("metadata.csv validation receipt has an invalid SHA-256")
+    if (
+        not isinstance(remote_size, int)
+        or isinstance(remote_size, bool)
+        or remote_size < 0
+    ):
+        errors.append("metadata.csv validation receipt has an invalid size")
+    if remote_commit != declared_revision:
+        errors.append(
+            "metadata.csv validation receipt differs from source_hub_revision"
+        )
+
+    metadata_bytes = metadata_path.read_bytes()
+    local_hash = hashlib.sha256(metadata_bytes).hexdigest()
+    if isinstance(remote_hash, str) and remote_hash != local_hash:
+        errors.append("local metadata.csv differs from the pinned repository bytes")
+    if isinstance(remote_size, int) and not isinstance(remote_size, bool):
+        if remote_size != len(metadata_bytes):
+            errors.append(
+                "local metadata.csv size differs from the pinned repository file"
+            )
+
+
+def validate_inventory_revision(
+    inventory: dict[str, object],
+    declared_revision: str,
+    errors: list[str],
+) -> None:
+    if inventory.get("sha") != declared_revision:
+        errors.append("repository inventory commit differs from source_hub_revision")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--relationships", type=Path, required=True)
+    parser.add_argument("--metadata", type=Path, required=True)
+    parser.add_argument("--repo-inventory-json", type=Path)
+    args = parser.parse_args()
+
+    fields, rows = read_csv(args.relationships)
+    metadata_fields, metadata_rows = read_csv(args.metadata)
+    del metadata_fields
+    errors: list[str] = []
+    if fields != FIELDS:
+        errors.append(f"field contract differs: {fields}")
+    if len(rows) != 27:
+        errors.append(f"expected 27 rows, observed {len(rows)}")
+
+    metadata_by_id = {row["record_id"]: row for row in metadata_rows}
+    paths = [row.get("file_path", "") for row in rows]
+    hashes = [row.get("sha256", "") for row in rows]
+    xet_hashes = [row.get("hub_xet_hash", "") for row in rows]
+    for label, values in (
+        ("file_path", paths),
+        ("sha256", hashes),
+        ("hub_xet_hash", xet_hashes),
+    ):
+        if not all(values) or len(values) != len(set(values)):
+            errors.append(f"{label} values must be nonblank and unique")
+
+    revisions = {row.get("source_hub_revision", "") for row in rows}
+    if len(revisions) != 1 or not revisions or not REVISION_RE.fullmatch(next(iter(revisions))):
+        errors.append("source_hub_revision must be one shared immutable commit")
+
+    canonical_by_set: dict[str, list[dict[str, str]]] = defaultdict(list)
+    derivatives: list[dict[str, str]] = []
+    for index, row in enumerate(rows, start=2):
+        label = f"row {index} {row.get('file_path', '')}"
+        if not HASH_RE.fullmatch(row.get("sha256", "")):
+            errors.append(f"{label}: invalid ordinary SHA-256")
+        if not HASH_RE.fullmatch(row.get("hub_xet_hash", "")):
+            errors.append(f"{label}: invalid Xet identity")
+        try:
+            if int(row.get("size_bytes", "")) <= 0:
+                raise ValueError
+        except ValueError:
+            errors.append(f"{label}: invalid size_bytes")
+        if row.get("sequence_completeness") != "owner_confirmed_complete":
+            errors.append(f"{label}: unexpected sequence completeness")
+        evidence_text = row.get("evidence_state", "")
+        evidence_tokens = [token.strip() for token in evidence_text.split(";")]
+        if not evidence_text or any(not token for token in evidence_tokens):
+            errors.append(f"{label}: evidence_state is blank")
+        elif len(evidence_tokens) != len(set(evidence_tokens)):
+            errors.append(f"{label}: evidence_state contains duplicate values")
+
+        role = row.get("object_role")
+        expected_evidence = EVIDENCE_BY_ROLE.get(role)
+        if expected_evidence is not None and set(evidence_tokens) != expected_evidence:
+            errors.append(f"{label}: evidence_state differs from the reviewed role")
+        if role == "canonical_fragment":
+            record_id = row.get("record_id", "")
+            if not RECORD_RE.fullmatch(record_id):
+                errors.append(f"{label}: invalid canonical record_id")
+            metadata = metadata_by_id.get(record_id)
+            if not metadata or metadata.get("file_name") != row.get("file_path"):
+                errors.append(f"{label}: canonical record_id/path does not join to metadata")
+            if metadata and metadata.get("hub_xet_hash") != row.get("hub_xet_hash"):
+                errors.append(f"{label}: canonical Xet identity differs from metadata")
+            if row.get("source_record_ids") or row.get("derivative_coverage"):
+                errors.append(f"{label}: canonical row has derivative-only values")
+            expected_path_prefix = (
+                f"Standard_Time_Lapses/{row.get('fragment_set_label', '')}.Rec"
+            )
+            if not row.get("file_path", "").startswith(expected_path_prefix):
+                errors.append(
+                    f"{label}: canonical path does not match fragment_set_label"
+                )
+            else:
+                rec_suffix = row["file_path"][len(expected_path_prefix) :]
+                match = re.fullmatch(r"([0-9]{2})\.mp4", rec_suffix)
+                if not match or match.group(1) != row.get("sequence_position", "").zfill(2):
+                    errors.append(
+                        f"{label}: RecNN suffix differs from sequence_position"
+                    )
+            canonical_by_set[row.get("fragment_set_label", "")].append(row)
+        elif role == "noncanonical_inshot_derivative":
+            if row.get("record_id"):
+                errors.append(f"{label}: noncanonical derivative has record_id")
+            if not row.get("file_path", "").startswith(
+                "Standard_Time_Lapses/Provenance/2026-08-27/InShot/"
+            ):
+                errors.append(f"{label}: derivative path is outside dated provenance")
+            if row.get("file_path") in {item["file_name"] for item in metadata_rows}:
+                errors.append(f"{label}: derivative leaked into canonical metadata")
+            if row.get("derivative_coverage") not in {
+                "complete_sequence",
+                "partial_sequence",
+            }:
+                errors.append(f"{label}: invalid derivative coverage")
+            if row.get("sequence_position"):
+                errors.append(f"{label}: derivative sequence_position must be blank")
+            derivatives.append(row)
+        else:
+            errors.append(f"{label}: invalid object_role")
+
+    canonical_ids_by_set: dict[str, list[str]] = {}
+    for set_label, set_rows in canonical_by_set.items():
+        try:
+            counts = {int(row["sequence_count"]) for row in set_rows}
+            positions = sorted(int(row["sequence_position"]) for row in set_rows)
+        except ValueError:
+            errors.append(f"{set_label}: noninteger sequence position/count")
+            continue
+        if counts != {len(set_rows)} or positions != list(range(1, len(set_rows) + 1)):
+            errors.append(f"{set_label}: sequence positions/count are not contiguous")
+        canonical_ids_by_set[set_label] = [
+            row["record_id"]
+            for row in sorted(set_rows, key=lambda item: int(item["sequence_position"]))
+        ]
+
+    if sorted(len(rows) for rows in canonical_by_set.values()) != [2, 2, 2, 6, 10]:
+        errors.append("canonical sequence cardinalities must be 2/2/2/6/10")
+    if len(derivatives) != 5:
+        errors.append(f"expected 5 derivatives, observed {len(derivatives)}")
+
+    for row in derivatives:
+        set_ids = canonical_ids_by_set.get(row["fragment_set_label"], [])
+        source_ids = [value for value in row["source_record_ids"].split(";") if value]
+        try:
+            derivative_count = int(row["sequence_count"])
+        except ValueError:
+            derivative_count = -1
+        if derivative_count != len(set_ids):
+            errors.append(
+                f"{row['file_path']}: derivative sequence_count differs from fragment set"
+            )
+        if not source_ids or len(source_ids) != len(set(source_ids)):
+            errors.append(f"{row['file_path']}: derivative source IDs are blank or duplicate")
+        if any(value not in set_ids for value in source_ids):
+            errors.append(f"{row['file_path']}: derivative source crosses fragment set")
+        if source_ids != [value for value in set_ids if value in source_ids]:
+            errors.append(f"{row['file_path']}: derivative sources are out of sequence")
+        if row["derivative_coverage"] == "complete_sequence" and source_ids != set_ids:
+            errors.append(f"{row['file_path']}: complete derivative omits or reorders sources")
+        if row["derivative_coverage"] == "partial_sequence" and not (
+            0 < len(source_ids) < len(set_ids)
+        ):
+            errors.append(f"{row['file_path']}: partial derivative is not a strict subset")
+
+    if args.repo_inventory_json:
+        loaded_inventory = json.loads(
+            args.repo_inventory_json.read_text(encoding="utf-8")
+        )
+        if not isinstance(loaded_inventory, dict):
+            errors.append("repository inventory must be a JSON object")
+            inventory: dict[str, object] = {}
+        else:
+            inventory = loaded_inventory
+        declared_revision = next(iter(revisions)) if len(revisions) == 1 else ""
+        validate_inventory_revision(inventory, declared_revision, errors)
+        validate_pinned_metadata(
+            inventory,
+            args.metadata,
+            declared_revision,
+            errors,
+        )
+        raw_siblings = inventory.get("siblings")
+        if not isinstance(raw_siblings, list):
+            errors.append("repository inventory lacks a siblings list")
+            raw_siblings = []
+        siblings = {
+            item["rfilename"]: item
+            for item in raw_siblings
+            if isinstance(item, dict) and isinstance(item.get("rfilename"), str)
+        }
+        for row in rows:
+            remote = siblings.get(row["file_path"])
+            if not remote:
+                errors.append(f"{row['file_path']}: missing from pinned repository inventory")
+                continue
+            lfs = remote.get("lfs") or {}
+            remote_size = remote.get("size")
+            if remote_size is None:
+                remote_size = lfs.get("size")
+            if int(remote_size or -1) != int(row["size_bytes"]):
+                errors.append(f"{row['file_path']}: repository size differs")
+            if str(lfs.get("sha256") or "").lower() != row["sha256"]:
+                errors.append(f"{row['file_path']}: repository LFS SHA-256 differs")
+            if str(remote.get("xetHash") or "").lower() != row["hub_xet_hash"]:
+                errors.append(f"{row['file_path']}: repository Xet identity differs")
+            if remote.get("repoCommit") != row["source_hub_revision"]:
+                errors.append(
+                    f"{row['file_path']}: repository identity came from a "
+                    "different revision"
+                )
+
+    summary = {
+        "rows": len(rows),
+        "canonical_fragments": sum(
+            row.get("object_role") == "canonical_fragment" for row in rows
+        ),
+        "noncanonical_derivatives": len(derivatives),
+        "fragment_sets": len(canonical_by_set),
+        "errors": errors,
+    }
+    print(json.dumps(summary, indent=2))
+    if errors:
+        raise SystemExit(1)
+
+
+if __name__ == "__main__":
+    main()