| <!-- |
| Thanks for opening a PR! Please fill in every section below. |
| PRs missing the doctrine checklist or DCO sign-off will be blocked. |
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| ## Summary |
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| <!-- 1–3 sentences. What does this change do and why. --> |
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| ## Lane |
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| - [ ] **Lane A** (community-open: `artifacts/amaru-uds/`, `docs/`, `.github/`, governance files, smoke tests, examples, bug fixes) |
| - [ ] **Lane B** (core proprietary: `packages/amaru-core/` or `packages/amaru-connection/` — confirm the issue is labelled `core:accept-pr`) |
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| ## Linked issue |
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| Fixes #<!-- issue number --> |
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| ## Type |
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| - [ ] Bug fix |
| - [ ] New feature |
| - [ ] Doctrine fix (formula / data / invariant) |
| - [ ] Documentation |
| - [ ] Build / CI / tooling |
| - [ ] Refactor (no behavior change) |
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| ## Doctrine pre-flight checklist |
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| <!-- REQUIRED if this PR touches packages/amaru-core/ or packages/amaru-connection/. --> |
| <!-- Strike through items that genuinely do not apply and say why. --> |
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| - [ ] POVM completeness: `Σ E_i = I` within 1e-9 for all constructed POVMs |
| - [ ] KS-18 2-regular cover preserved: every vector index appears in exactly 2 of 9 contexts |
| - [ ] KS-18 unsatisfiability: exhaustive `{0,1}^18` search returns 0 satisfying assignments |
| - [ ] Tetrad orthonormality: `⟨e_i, e_j⟩ = δ_ij` within 1e-9 |
| - [ ] Bohr complementarity floor: `σ_A · σ_B ≥ 0.25 − ε` on the worst-case conjugate pair |
| - [ ] Fisher–Rao metric: zero, symmetry, triangle inequality, simplex closed form |
| - [ ] `node doctrine-demo.mjs` against the rebuilt dist shows the expected verdict table |
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| If you skipped any item, explain why here: |
| <!-- ... --> |
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| ## Tests |
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| - [ ] New behavior has a unit test |
| - [ ] Bug fix has a regression test that failed on `main` and passes with this PR |
| - [ ] `pnpm -F @amaru/core test:doctrine` is green locally |
| - [ ] `bash scripts/smoke-from-public-url.sh` is green locally (for release-affecting PRs) |
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| ## Documentation |
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| - [ ] `CHANGELOG.md` updated under `## [Unreleased]` |
| - [ ] Public docs (`docs/`, `README.md`) updated where behavior changed |
| - [ ] Code comments updated where a non-obvious invariant changed |
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| ## Backward compatibility |
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| - [ ] No public API change |
| - [ ] Public API change — migration note added to `CHANGELOG.md` |
| - [ ] UDS package layout change — `MANIFEST.json` and `OPERATOR-QUICKSTART.md` updated |
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| ## DCO sign-off |
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| - [ ] Every commit in this PR has a `Signed-off-by:` trailer (use `git commit -s`) |
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| ## Reviewer notes |
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| <!-- Anything reviewers should look at first, edge cases, deliberate non-goals, etc. --> |
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