a3ca6ff6d6
Phase 4 of the CJS↔SDK hard-seam migration (parent #3524). Eliminates the `findProjectRoot` duplication that lived at bin/lib/core.cjs:74-140 and sdk/src/query/helpers.ts:497-590, the drift carrier behind historical bugs #1362 and #2561. - sdk/src/project-root/index.ts — source of truth (120 lines, pure-with-sync-fs). Exports findProjectRoot(startDir: string) and FIND_PROJECT_ROOT_MAX_DEPTH constant. - sdk/src/project-root/index.test.ts — 13 vitest pinning fixtures covering all four heuristics, the #1362 guard, malformed config fallback, empty sub_repos, deep nesting, and depth-limit enforcement. - sdk/scripts/gen-project-root.mjs — generator. Captures function body via Function.prototype.toString() from compiled sdk/dist/. Emits CJS preamble for destructured node:fs / node:path / node:os imports. - sdk/scripts/check-project-root-fresh.mjs — freshness check. Imports the generator function directly (Phase 3's cleaner pattern). - get-shit-done/bin/lib/project-root.generated.cjs — generator- emitted CJS mirror. - tests/project-root-generator.test.cjs — 11 parity assertions comparing SDK source and generated CJS for every fixture. - sdk/src/query/helpers.ts: -127 lines. The 94-line inline findProjectRoot plus the FIND_PROJECT_ROOT_MAX_DEPTH constant (originally at line 471) replaced by a single re-export: `export { findProjectRoot } from '../project-root/index.js';` Removed unused `parse as parsePath` import. - get-shit-done/bin/lib/core.cjs: -83 lines net. The 67-line inline findProjectRoot replaced by a single `require('./project-root.generated.cjs')`. The detectSubRepos helper at lines 40-56 stays (used by loadConfig migration). - sdk/package.json: gen:project-root + check:project-root-fresh scripts. - package.json: proxy for the freshness check. - .githooks/pre-commit: drift block. - .github/workflows/test.yml: drift check step after the state-document drift step. - CONTEXT.md: Project-Root Resolution Module entry. - docs/INVENTORY.md, docs/INVENTORY-MANIFEST.json: +1 module count, +1 row. - Full suite: 9226/9226 pass (baseline 9215 + 11 new parity fixtures). - SDK vitest: 1804/1804 pass. - Reader shrink: -127 SDK + -83 CJS = 210 lines of duplication deleted across the two Readers. New shared Module is 120 lines. 1. Depth limit canonicalization. CJS findProjectRoot previously had no explicit walk-up bound (walked until dir === root or homedir). The new Module uses FIND_PROJECT_ROOT_MAX_DEPTH = 10, matching the SDK's pre-existing value. Only affects paths nested more than 10 levels deep from a .planning/ root — a pathological case in practice. None of the existing 22 CJS findProjectRoot tests covered this; the new parity test does. 2. platformReadSync → readFileSync. The old CJS findProjectRoot used the platformReadSync wrapper from shell-command-projection.cjs for reading .planning/config.json, which returns null on read failure. The Module uses raw readFileSync, which throws — caught by the surrounding try/catch that already swallowed errors. Functionally equivalent for the existing code path; no test exercises the null-return semantic. Closes #3553.
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