docs: correct source datasets (Phase 3 = the-stack-v2-dedup, Phase 2 = the-stack v1)

README.md

@@ -921,7 +921,7 @@ Prior work ([Aryabumi et al., 2024 -- "To Code or Not to Code"](https://arxiv.or
 
 ## Dataset Description
 
-This dataset provides filtered, quality-controlled Python source code in multiple configurations: the original English, three keyword-swapped variants (Chinese, Spanish, Urdu), a blended native+transpiled mix, strictly native Chinese code, and a model-translated set in which an LLM translates the full source (identifiers, strings, and comments, not just keywords). The source data is drawn from [bigcode/the-stack-dedup](https://huggingface.co/datasets/bigcode/the-stack-dedup) (Python subset), filtered for quality using the following criteria:
+This dataset provides filtered, quality-controlled Python source code in multiple configurations: the original English, three keyword-swapped variants (Chinese, Spanish, Urdu), a blended native+transpiled mix, strictly native Chinese code, and a model-translated set in which an LLM translates the full source (identifiers, strings, and comments, not just keywords). Python source for Conditions 1, 2, and 5 is drawn from [bigcode/the-stack-v2-dedup](https://huggingface.co/datasets/bigcode/the-stack-v2-dedup) (Python subset) for the current Phase 3 configs; the legacy `phase-2-the-stack-v1-*` configs are sourced from [The Stack v1](https://huggingface.co/datasets/bigcode/the-stack). Conditions 3 and 4 additionally draw on natively-authored code (see those conditions below). Source files are filtered for quality using the following criteria:
 
 - AST-valid Python only (must parse without errors)
 - Permissive licenses only (MIT, Apache-2.0, BSD, etc.)
@@ -967,7 +967,7 @@ Used by: `condition-1-en-*`, `condition-2-zh-*`, `condition-2-es-*`, `condition-
 | `code`        | string | Python source code. For condition-2 configs, this is the transpiled (keyword-swapped) version. For condition-1, this is the original English source. |
 | `code_en`     | string | Original English Python source code. Identical to `code` for condition-1-en.                                                                         |
 | `language`    | string | ISO 639-1 language code: `en`, `ur`, `zh`, or `es`.                                                                                                  |
-| `file_path`   | string | Original file path in The Stack Dedup.                                                                                                               |
+| `file_path`   | string | Original file path in the source dataset.                                                                                                               |
 | `license`     | string | SPDX license identifier for the source file.                                                                                                         |
 | `token_count` | int64  | Token count computed using the CohereLabs/tiny-aya-base tokenizer.                                                                                   |
 
@@ -982,7 +982,7 @@ Condition 5 uses the conditions 1--2 schema plus an `idx` column. `code` is the
 | `code`        | string | Model-translated Python source (full LLM translation via Cohere Aya).                 |
 | `code_en`     | string | Original English Python source code.                                                  |
 | `language`    | string | ISO 639-1 language code: `ur`, `zh`, or `es`.                                         |
-| `file_path`   | string | Original file path in The Stack Dedup.                                                |
+| `file_path`   | string | Original file path in the source dataset.                                                |
 | `license`     | string | SPDX license identifier for the source file.                                          |
 | `idx`         | int64  | Source row index into `condition-1-en-5k`. Enables row-level joins across conditions.  |
 | `token_count` | int64  | Token count computed using the CohereLabs/tiny-aya-base tokenizer.                     |
@@ -1087,7 +1087,8 @@ native_only = train.filter(lambda x: x["source_type"] == "native")
 
 | Parameter              | Value                                                                                                              |
 | ---------------------- | ------------------------------------------------------------------------------------------------------------------ |
-| Source dataset         | [bigcode/the-stack-dedup](https://huggingface.co/datasets/bigcode/the-stack-dedup) (Python subset)                 |
+| Source dataset (Phase 3, `condition-*`) | [bigcode/the-stack-v2-dedup](https://huggingface.co/datasets/bigcode/the-stack-v2-dedup) (Python subset) |
+| Source dataset (Phase 2, `phase-2-the-stack-v1-*`) | [bigcode/the-stack](https://huggingface.co/datasets/bigcode/the-stack) (The Stack v1) |
 | Transpilation tool     | [Legesher](https://github.com/legesher/legesher) v0.7.3 (legesher-core, legesher-i18n)                             |
 | Tokenizer              | CohereLabs/tiny-aya-base                                                                                           |
 | Base model             | [CohereLabs/tiny-aya-base](https://huggingface.co/CohereLabs/tiny-aya-base) (3.35B params)                         |
@@ -1098,7 +1099,7 @@ native_only = train.filter(lambda x: x["source_type"] == "native")
 
 ## Limitations
 
-- **Source bias**: The Stack Dedup skews toward popular, well-starred GitHub repositories, which may not represent the full diversity of Python code in the wild.
+- **Source bias**: The Stack skews toward popular, well-starred GitHub repositories, which may not represent the full diversity of Python code in the wild.
 - **Keyword-only transpilation**: Legesher translates Python reserved words (keywords, builtins, exceptions) but leaves comments, docstrings, string literals, and variable/function names in their original language (typically English). This means condition-2 code is a hybrid of translated keywords and English identifiers.
 - **Token count variation**: Transpiled code may have different token counts than the English original due to multi-byte characters (especially for Chinese and Urdu), even though the code structure is identical.
 - **Single programming language**: Currently limited to Python. Results may not generalize to other programming languages.
@@ -1121,7 +1122,8 @@ native_only = train.filter(lambda x: x["source_type"] == "native")
 
 - [Legesher on GitHub](https://github.com/legesher/legesher)
 - [Tiny Aya Expedition](https://aya.for.ai)
-- [bigcode/the-stack-dedup](https://huggingface.co/datasets/bigcode/the-stack-dedup)
+- [bigcode/the-stack-v2-dedup](https://huggingface.co/datasets/bigcode/the-stack-v2-dedup) (Phase 3 source)
+- [bigcode/the-stack](https://huggingface.co/datasets/bigcode/the-stack) (The Stack v1 — Phase 2 source)
 - [Language Decoded Community (native code)](https://huggingface.co/datasets/legesher/language-decoded-community)
 - [Language Decoded Experiments (tracking)](https://huggingface.co/datasets/legesher/language-decoded-experiments)
 - [Language Decoded LoRA (model hub)](https://huggingface.co/legesher/language-decoded-lora)