Add curated fixture generator

[the-Drunken-coder]

Summary

• Add a JSON source for curated land-unit fixtures and generate src/data/symbols.ts from it.
• Validate generated SIDCs preserve the known number-SIDC field positions and render with the installed milsymbol package.
• Wire fixture checks into npm test/prepack and document the regenerate/check commands.

Validation

• npm test
• npm pack --dry-run

Scope limits

• Keeps the current curated fixture set unchanged.
• Does not add broader SIDC corpus coverage or image/reverse lookup.

Greptile Summary

This PR adds a curated fixture generator for land-unit symbols. The main changes are:

• Adds a JSON source for curated land-unit fixtures.
• Generates src/data/symbols.ts from the fixture source.
• Validates generated SIDCs against milsymbol metadata and rendering.
• Adds fixture check and generation commands to npm scripts.
• Documents the fixture workflow in the README.

Confidence Score: 5/5

The curated fixture generation, validation, test, and package lifecycle paths are working as intended.

No code issues were identified. The fixture workflow was exercised through generation checks, drift detection, the test suite, and package dry-run behavior, with the expected validation coverage for SIDC field positions and milsymbol rendering.

None.

T-Rex Logs

What T-Rex did

• The team attempted to generate curated fixtures before dependencies were installed; the generate-curated-fixtures -- --check script name was absent and npm test/npm pack failed because milsymbol was not installed.
• After dependencies were installed, npm install completed, fixture checks were run and regeneration succeeded, an intentional drift was detected, and the fixture check was restored.
• The test suite and packaging checks ran; npm test executed with check:fixtures and build, covering 11 node tests with 0 failures, including land-unit fixture field-position and milsymbol rendering coverage, and npm pack --dry-run completed successfully.

_{Ran code and verified through T-Rex}

_{Reviews (2): Last reviewed commit: "fix: harden fixture generator checks" | Re-trigger Greptile}

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: eba350e0-44a8-4917-a2b1-ef621495faca

📥 Commits

Reviewing files that changed from the base of the PR and between 3b6285b and d09cad5.

📒 Files selected for processing (5)

• README.md
• fixtures/curated-land-units.json
• package.json
• scripts/generate-curated-fixtures.mjs
• src/data/symbols.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/add-fixture-generator

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[the-Drunken-coder]

@codex review

[the-Drunken-coder]

@greptileai review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. More of your lovely PRs please.

Reviewed commit: d569f6540a

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