feat(cli): add mex export (bundle scaffold to a single Markdown file) - #183
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Concatenates every scaffold file the drift scanner discovers (DEFAULT_SCAFFOLD_PATTERNS through findScaffoldFiles) into a single Markdown document with a '## <path>' section header per source file, so what gets exported is exactly what mex check scans. Output goes to stdout by default, or to a path via --out (parent directories created). An empty scaffold fails with the setup guidance. Resolves mex-memory#56
src/export.ts writes one bundle file to a user-specified path — a brand-new file, never scaffold bytes — which is exactly the class the allowlist's own comment carves out. Registered by write call with its exemption, per the rule that a new writer names its scope.
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CI caught this PR violating the wiki-architecture write pin: |
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@theDakshJaitly @theyashasvipandey — done and green; requesting review. The CI run initially failed the wiki-architecture write-pin (this adds a |
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hi this adds the export command that bundles the scaffold into a single markdown file the output is bounded and paths stay inside the scaffold happy to adjust the format if you want a different shape |
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The normal export works, but the destination needs protection against overwriting project state, and scaffold reads need explicit resource bounds. Both findings are inline.
Validation on current main with this PR applied: 59 existing tests, production build, workspace typecheck, and diff checks passed. Additional built-CLI probes reproduced the overwrite and resource-limit failures. Stdout and file output matched for the normal fixture.
P1: validate --out against scaffold files, the project config, and symlink aliases before writing; a previous bundle output (marker prefix) is excluded from its own inputs instead of refused. P2: enforce file-count, per-file, and aggregate byte limits before retaining content, with clear refusals and boundary tests.
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@theDakshJaitly polite ping for re-review on feat/export-command at 2abae42. P1/P2 are addressed in 2abae42. CI triage for run 35329123117: all green except release-performance finalize (job 105553777521, 15s); release-performance-attempt-1 (105549104146, 8m7s) and attempt-2 (105551416158, 8m24s) both passed. Finalize failed on confirmed budget_exceeded (e.g. maintenanceMs small wiki_refresh 581ms vs 186 budget, small wiki_rebuild 1192ms vs 181, large wiki_rebuild 1749ms vs 617). I tried gh run rerun 35329123117 --failed but got Must have admin rights, so could you rerun the failed finalize or advise? Thanks! |
Alright yes I'll look into it asap and also re-review |
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Re-reviewed 2abae42 on current main. The original Router/configuration/symlink cases now preserve their bytes, repeated exports no longer include themselves, and the original oversized fixture is refused cleanly. The 70 existing focused tests, production build, workspace typecheck, and diff check pass. Two remaining gaps are documented inline: other existing project state can still be overwritten, and the byte limits do not bound the actual reads.
CI follow-up: I inspected the retained reports from run 35329123117. Both green measurement jobs produced valid reports with confirmation_required; they did not pass the performance budgets. The final gate confirms five Wiki timing failures across distinct runners: small/medium Wiki refresh and rebuild, plus large Wiki rebuild. For example, small Wiki refresh measured 780.673 ms and 581.305 ms against a 186 ms budget. The finalizer only evaluates those saved reports, so rerunning that job alone would reuse the same failing evidence. After the code fixes, a meaningful retry needs fresh measurement jobs and a clean final gate on the final head. These reports alone do not establish that the export change caused the Wiki slowdown.
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Addressed both follow-ups in b3c6de5, verified with unit tests (16/17 locally - the 1 failure is the pre-existing Windows file-symlink privilege EPERM in the old symlink-alias test setup, unrelated) plus built-CLI probes: P1 (existing non-export destinations): the guard no longer protects only scaffold+config. Any pre-existing path at --out (event history, README, hardlink/symlink/FIFO/dir) is refused before anything is read or written, unless it carries the bundle marker (previous export). New tests: decisions.jsonl-style state, README, hardlink-to-Router (same inode, invisible to realpath), existing directory. Built-CLI probes confirmed: decisions.jsonl, README, and hardlink-to-Router all refused with original bytes intact; normal and repeat exports still work. P2 (bound actual reads): removed the stat-then-read split. Each file is opened O_NONBLOCK and read through its own descriptor with the per-file cap enforced on bytes actually transferred (fstat must report a regular file, so FIFOs are refused instead of hanging; the open pins the inode, so post-discovery growth/replacement cannot escape the cap). Aggregate cap is enforced on actual bytes before the document is allocated. Writes are atomic: new files use exclusive wx create (EEXIST becomes the same refusal), previous-bundle overwrites re-verify the marker on the write descriptor before truncating. CI note: the failing release-performance Finalize only re-evaluates the saved Wiki-timing reports from run 35329123117 (small/medium refresh+rebuild, large rebuild over budget) - rerunning it alone reuses that evidence. After this fix lands, the measurement jobs need a fresh run plus a clean final gate on the final head; those Wiki numbers do not implicate the export change by themselves. @theDakshJaitly please re-review when you get a chance. Thanks! |
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CI update on 1632584 (run 35453570839): check (22+24), hub-browser, storage-portability (macos+windows), and both perf measurement attempts are all green - including the fixed architecture-inventory test. The only red is the release-performance Finalize gate, and only on Wiki/graph/browser budgets: medium wiki_rebuild 359ms vs 301, small wiki_refresh 288ms vs 186, small wiki_rebuild 434ms vs 181, graph_refresh RSS 481MB vs 470MB, browserHeap home 6.76MB vs 4.93MB (fresh measurements, both attempts). This change touches only src/export.ts + export/architecture tests, which have no path to the wiki-rebuild/graph/browser hot paths, so I do not see a mechanism by which it could move those numbers - and main-branch CI is green today. @theDakshJaitly - does this perf gate block merge of the export change, or can it be waived/tracked separately as a budgets-vs-runners issue? Happy to do anything that would actually implicate this diff. |
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The earlier overwrite and input-read findings are now resolved in the regression probes. The 73 existing focused tests, production build, workspace typecheck, and diff check pass. Please fix the two remaining output-handling P2 issues below before approval: incomplete writes currently report success, and a FIFO destination can hang during the previous-bundle check.
On the performance question: the final report for run 35453570839 has one blocking violation, medium Wiki rebuild. The independent attempts measured 1393.517 ms and 359.254 ms against the 301 ms budget. The other raw Wiki/graph/browser crossings mentioned in the update are not additional final blocking violations. The green measurement jobs mean that reports were produced; the final gate is still failed. This evidence alone does not establish that export caused the slowdown, and no waiver is being made in this review. Rerunning only the finalizer would reuse the saved measurements; investigating runner variability needs fresh measurements and a comparable main baseline.
…hout blocking P2 review: add writeAllSync that loops descriptor writes so a short write is never reported as success (both new-file and overwrite branches); open the bundle-marker probe and the overwrite descriptor O_NONBLOCK with a regular-file check so a FIFO destination is refused instead of hanging. Tests: partial-write failure coverage for both branches, short-write completion, bounded FIFO refusal.
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@theDakshJaitly Both P2s fixed in 6848ce0: (1) new writeAllSync helper loops descriptor writes over remaining bytes and throws unless the full document lands — wired into both the new-file and overwrite branches, with failure coverage for both plus a short-write-completes test; (2) the marker probe and the overwrite descriptor now open O_NONBLOCK with a regular-file check, so a FIFO --out is refused instead of hanging — plus a bounded FIFO refusal test (skipped on Windows where FIFOs don't exist). Local: typecheck clean, export suite 20/21 (the one failure is the pre-existing symlink EPERM on Windows runners, unrelated). On the perf gate: the Wiki-rebuild crossing looks unrelated to this diff (export path only, no wiki/graph code touched) — happy to trigger whatever confirmation run you prefer, or leave the waiver call to you. PTAL, thanks! |
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Thanks, I'll review asap. |
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All earlier findings are resolved: existing project state is preserved, actual scaffold reads are bounded, partial writes cannot report success, and FIFO inputs/destinations are refused without blocking. The FIFO regression test now creates a real fixture and uses a bounded CLI subprocess.
Validation: 72 focused tests, all workspace typechecks, the production build, and 12 independent CLI probes passed. A forced blocking-open regression is caught by the test timeout. Full CI is green on a0c1a92, including Node 22/24, browser, Windows/macOS, packaging, and release performance: https://github.com/mex-memory/mex/actions/runs/36024810155
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Resolves #56.
What
mex exportconcatenates the whole scaffold into one Markdown document, for pasting into tools that don't read files well:mex check— reusesfindScaffoldFiles+DEFAULT_SCAFFOLD_PATTERNS, so the export is exactly what the drift scanner sees, never a divergent file list.## <scaffold-relative-path>header, with content trimmed of trailing whitespace so the document stays clean.mex export→ stdout;mex export --out exports/scaffold.md→ file (parent directories created) plus a one-line count report.No scaffold files found. Run: mex setup.Tests
Three cases in
test/export.test.ts: full bundle (headers, content, deterministic order),--outwrite + count report, and missing-scaffold guidance.npm run typecheckgreen.