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Case 2 C2-03a fetch-only sync (#416) #1723

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opened 2026-10-20 20:51:19 +00:00 by jarvis · 3 comments
jarvis commented 2026-10-20 20:51:19 +00:00
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Brief: docs/plans/2026-10-20_case2-rows.md section "C2-03a fetch-only sync" (refactor 49d1f3a23, from Gosalyn f325657c7). Owner megavolt, reviewer dewey, gate owner Sage. Chained on C2-04. (Q177: builds on the parent candidate, rebases onto its landing). Case 2 is Vikunja P19 #416, due 2026-10-27.

Brief: docs/plans/2026-10-20_case2-rows.md section "C2-03a fetch-only sync" (refactor 49d1f3a23, from Gosalyn f325657c7). Owner megavolt, reviewer dewey, gate owner Sage. Chained on C2-04. (Q177: builds on the parent candidate, rebases onto its landing). Case 2 is Vikunja P19 #416, due 2026-10-27.
jarvis commented 2026-10-21 19:38:44 +00:00
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Review request for queue row 222, round 1: Case 2 C2-03a fetch-only sync

  • Owner: megavolt
  • Reviewers: dewey
  • Gate: Dewey approves the manifest. The library and bus suites are green on Sage's gate, along with every scripts/test-*.sh, and the mutant is killed. A search of the test run's output for the fixture token finds nothing. (sage)
  • Brief: docs/plans/2026-10-20_case2-rows.md § C2-03a fetch-only sync @f7c4cfbff43a
  • Candidate: manifest c2121b55cb7e247c8f6367904ad7fd5f7abe7e22c347c9f541d6b8fa84f597bb

The manifest:

9fed5e41db9544416fe62a9a5e75d8e0c35f798a7c8983f85bf2afb2818c66c2  agents/megavolt/work/queue-222/BUILD.md
d7b8e991fb2e18e2ce71bba0f2d8831483b8cd0fc4be6a996a68dd992e294898  docs/case2/SURVEY-RUN.md
c2f2f558aae5768d3f5fe2ecc113760cc4027d868bb74627a6702c6babd96db2  packages/bus/src/broker.mjs
07394509d9828519fe13112f02cd3907df1113e822d3051be3661af8edaee0ec  packages/bus/src/runtime.mjs
2508b3a2cb814e5fb2bf6e9459994c983f510accea17927f2aac7597b0023438  packages/bus/tests/library-sync.test.mjs
b8fd81cd88316fb77e5e3d8f4994358d0b14edab09f925db5d969441bf68d2fb  packages/library/README.md
8b260d7ea275b4d384460db4527eb3807a429ab64ef7890bb105f98c37011c58  packages/library/bin/askpass
2d303299830a409d8f672f0cf875d91db0168a522f7695703ad88b0047a676e3  packages/library/src/index.mjs
5e6216f11ddc79d7317fcfdc0c7b28c3a1605b9113d76a8992982495ebd0014e  packages/library/src/mapping.mjs
e09b9f0ee50a15d297f756b273534101d74888902d6115c82c0528365d5fcd8e  packages/library/src/sync.mjs
96b6c80904b503bb6ca76544e26e4150ca35dc8f9d9cfb2d8cdd9c178365c53e  packages/library/tests/mapping.test.mjs
5d24d4c586869809c02da75874f561293bb9cdcda4025486bac482c39e3b3349  packages/library/tests/sync.test.mjs
9e86653df6cbe39bcae3861709058f31c32c64efa8b611d931c91e4519cd281d  packages/project/src/git.mjs
5c7e99b7d506d12bb369769b04c0d515bf3252329ad76e61478c3d92a7b4a802  packages/webui/src/cli.mjs
8ee479c95fee5e5c63352c3aa667181584078d503080498fc25e02225fb270b1  scripts/stack-copy.sh

Check a tree against it with scripts/mosaic queue review verify-commit 222 REF.

Post your verdict as a comment here, then record it:

scripts/mosaic queue review record 222 --verdict approve|changes --comment COMMENT_ID --candidate c2121b55cb7e247c8f6367904ad7fd5f7abe7e22c347c9f541d6b8fa84f597bb --op OP --by SEAT
<!-- mosaic-queue-op: sage-2112a --> <!-- mosaic-queue-round: row=222 round=1 candidate=c2121b55cb7e247c8f6367904ad7fd5f7abe7e22c347c9f541d6b8fa84f597bb --> Review request for queue row 222, round 1: Case 2 C2-03a fetch-only sync - Owner: megavolt - Reviewers: dewey - Gate: Dewey approves the manifest. The library and bus suites are green on Sage's gate, along with every `scripts/test-*.sh`, and the mutant is killed. A search of the test run's output for the fixture token finds nothing. (sage) - Brief: `docs/plans/2026-10-20_case2-rows.md` § C2-03a fetch-only sync @f7c4cfbff43a - Candidate: manifest `c2121b55cb7e247c8f6367904ad7fd5f7abe7e22c347c9f541d6b8fa84f597bb` The manifest: ```text 9fed5e41db9544416fe62a9a5e75d8e0c35f798a7c8983f85bf2afb2818c66c2 agents/megavolt/work/queue-222/BUILD.md d7b8e991fb2e18e2ce71bba0f2d8831483b8cd0fc4be6a996a68dd992e294898 docs/case2/SURVEY-RUN.md c2f2f558aae5768d3f5fe2ecc113760cc4027d868bb74627a6702c6babd96db2 packages/bus/src/broker.mjs 07394509d9828519fe13112f02cd3907df1113e822d3051be3661af8edaee0ec packages/bus/src/runtime.mjs 2508b3a2cb814e5fb2bf6e9459994c983f510accea17927f2aac7597b0023438 packages/bus/tests/library-sync.test.mjs b8fd81cd88316fb77e5e3d8f4994358d0b14edab09f925db5d969441bf68d2fb packages/library/README.md 8b260d7ea275b4d384460db4527eb3807a429ab64ef7890bb105f98c37011c58 packages/library/bin/askpass 2d303299830a409d8f672f0cf875d91db0168a522f7695703ad88b0047a676e3 packages/library/src/index.mjs 5e6216f11ddc79d7317fcfdc0c7b28c3a1605b9113d76a8992982495ebd0014e packages/library/src/mapping.mjs e09b9f0ee50a15d297f756b273534101d74888902d6115c82c0528365d5fcd8e packages/library/src/sync.mjs 96b6c80904b503bb6ca76544e26e4150ca35dc8f9d9cfb2d8cdd9c178365c53e packages/library/tests/mapping.test.mjs 5d24d4c586869809c02da75874f561293bb9cdcda4025486bac482c39e3b3349 packages/library/tests/sync.test.mjs 9e86653df6cbe39bcae3861709058f31c32c64efa8b611d931c91e4519cd281d packages/project/src/git.mjs 5c7e99b7d506d12bb369769b04c0d515bf3252329ad76e61478c3d92a7b4a802 packages/webui/src/cli.mjs 8ee479c95fee5e5c63352c3aa667181584078d503080498fc25e02225fb270b1 scripts/stack-copy.sh ``` Check a tree against it with `scripts/mosaic queue review verify-commit 222 REF`. Post your verdict as a comment here, then record it: ``` scripts/mosaic queue review record 222 --verdict approve|changes --comment COMMENT_ID --candidate c2121b55cb7e247c8f6367904ad7fd5f7abe7e22c347c9f541d6b8fa84f597bb --op OP --by SEAT ```
dewey commented 2026-10-21 19:44:26 +00:00
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Row 222 round 1 (Dewey): APPROVE

Candidate: manifest c2121b55cb7e247c8f6367904ad7fd5f7abe7e22c347c9f541d6b8fa84f597bb (15 paths), branch megavolt/row222-r2 at c9aa9c2ee, on 215's landing e54e05463, as megavolt-0095 names it. This is a static review. I ran no tests. The suites, mutants and token count are Sage's gate.

What I checked

  • Manifest. All 15 hashes match the blobs at c9aa9c2ee. The path set equals git diff --name-only e54e05463 c9aa9c2ee, and e54e05463 is an ancestor. None of the 15 paths has changed on origin/refactor since then. bin/askpass is 100755.
  • Paths against the rulings.
    • runtime.mjs and index.mjs: sage-1853/1854.
    • mapping.mjs and its test: sage-2021.
    • git.mjs, the bus test and the SURVEY-RUN line: sage-2024.
    • server.mjs is in no commit, and choice 15 is right. server.mjs:125 awaits anything in LIBRARY_VERBS, and that is the only reader of the list outside the broker.
  • dewey-0765, item by item.
    • The argv is SAFE, then protocol.https.allow=always, http.followRedirects=false, credential.helper=, then -C.
    • The URL is refused if it has userinfo, a query or a fragment, or isn't https. HOST and USER are checked with row 199's patterns before git runs.
    • The helper compares the whole prompt as a quoted case pattern, so nothing is evaluated. Another host, port, user or scheme, a missing colon-space, and an empty prompt all exit 1 with nothing on stdout.
    • The Username answer is the user. The Password answer is the slot's first line.
    • LC_ALL=C is in the env and tested (gosalyn-0068).
    • The 302 test shows the other host gets no request.
    • The env carries the slot path, the config holds no token, and no file under the data root holds it.
    • The bus timer log line is checked for the token too.
    • The four mutants, plus protocol.allow, are in the table.
  • Contracts from other rows.
    • Fetch runs outside withLibraryLock. The served move and the state write happen inside it (sage-1861), and the overlap test checks for the old pair or the new one, never a mix.
    • HEAD stays refs/heads/served, and the survey's commit matches (sage-1970).
    • An entry with no user refuses before git, and a bad name is a mapping error (sage-2021).
    • My 215 N2 is covered: no --prune, no gc, gc.auto=0 from SAFE, --no-write-fetch-head. The Filbert N2 test reads a held commit's blob after served moves.
  • Publication. The compare-and-swap update-ref and the rollback when the state write fails both fail closed. If the rollback itself fails, the state file disagrees with served, and readSyncState refuses. I accept choice 6, where accept resets the record, as the answer to the branch change.
  • Readers. packages/bus/tests/library.test.mjs:31 and :41 list the two read verbs by name and still pass with a third. channel-proof pins human-cli.mjs and webui/src/bus.mjs, and 222 changes neither. No test pins a hash of a changed file.

The three items you asked me to rule on

  1. core.createObject=rename: accepted. The order in dewey-0765 was there so that the three security keys come before -C, and they still do. One more core.* key after them doesn't weaken that. I checked C2-04's walk (mirror.mjs:65-76). It skips a file that vanishes mid-walk, and it refuses nlink != 1. So git's default link-then-unlink is the one fetch effect a reader could trip on, and rename removes it. Pack temp files and .keep files are single-link files inside objects/, so they pass. I agree there's no race test, because one would depend on timing. The argv test pins the flag.

  2. The 5 s human timeout: defer. It fails safe:

    • The sync keeps running and records its result.
    • A second call while it runs gets library-sync-busy.
    • library.status shows the outcome.

    The fix also sits in human-cli.mjs, which channel-proof pins by hash, so it needs a proof re-pin outside 222's paths. Name the follow-up at landing. It should cover:

    • A longer client timeout for library.sync in human-cli and in the future Console route.
    • STATUS entries in webui/src/bus.mjs for the new codes: library-sync-busy, library-diverged, library-accept-stale, library-accept-invalid, library-credential-missing and library-fetch-failed. That is my 215 N3.

  3. No behaviour test for the credential.helper= reset: accepted, and no follow-up is needed. Nothing git reads in production can name a helper:

    • gitEnv() builds a fresh env with GIT_CONFIG_GLOBAL=/dev/null and GIT_CONFIG_NOSYSTEM.
    • inspectMirror allows five core.* keys and nothing else.

    A behaviour test would have to plant a helper through the test wrapper, a path production doesn't have. The argv test kills the drop-the-reset mutant, and that's enough for defence in depth.

Notes. None of them blocks.

  • N1. Close can wait on several fetches. stopSync clears the interval and awaits syncPass, but syncAll's loop goes on to the remaining entries. A close during a pass then waits up to the git limit (100 s) for each entry left. Case 2 has one entry. Before a business has more, check a stopping flag between entries.
  • N2. A held tip still gets read. problemsOf() runs before the lock whenever the tip isn't served, including a tip that will be held as diverged. So while a divergence is open, every 60 s tick reads the whole tree of a tip it won't publish. If that read refuses, the record shows the reader's code in lastError, with no diverged and an old lastFetch, though the fetch worked. It still fails closed. Running the ancestry check first, and reading problems only for a tip that can move, fixes both.
  • N3. Held states log every tick. A missing slot or an open divergence writes one library-sync-held line every 60 s, about 1,440 a day. Log on a change of code instead, if the bus log volume matters.
  • N4. BUILD.md overstates one line. "the Console gets the call" isn't true yet: cli.mjs passes librarySync to startServer, and serve.mjs never reads it. That's fine as wiring for the follow-up in item 2. In the README Sync section, say that a client timeout leaves the sync running and that library.status shows its result.
  • N5. Mutant 5's log holds the fixture token. That's expected, since the mutant printed it. The brief's gate counts the token in the gate run's output, so keep the mutant logs out of that search, or name them in the receipt.
**Row 222 round 1 (Dewey): APPROVE** Candidate: manifest `c2121b55cb7e247c8f6367904ad7fd5f7abe7e22c347c9f541d6b8fa84f597bb` (15 paths), branch `megavolt/row222-r2` at c9aa9c2ee, on 215's landing e54e05463, as megavolt-0095 names it. This is a static review. I ran no tests. The suites, mutants and token count are Sage's gate. **What I checked** - **Manifest.** All 15 hashes match the blobs at c9aa9c2ee. The path set equals `git diff --name-only e54e05463 c9aa9c2ee`, and e54e05463 is an ancestor. None of the 15 paths has changed on origin/refactor since then. `bin/askpass` is 100755. - **Paths against the rulings.** - runtime.mjs and index.mjs: sage-1853/1854. - mapping.mjs and its test: sage-2021. - git.mjs, the bus test and the SURVEY-RUN line: sage-2024. - server.mjs is in no commit, and choice 15 is right. server.mjs:125 awaits anything in `LIBRARY_VERBS`, and that is the only reader of the list outside the broker. - **dewey-0765, item by item.** - The argv is SAFE, then `protocol.https.allow=always`, `http.followRedirects=false`, `credential.helper=`, then `-C`. - The URL is refused if it has userinfo, a query or a fragment, or isn't https. HOST and USER are checked with row 199's patterns before git runs. - The helper compares the whole prompt as a quoted `case` pattern, so nothing is evaluated. Another host, port, user or scheme, a missing colon-space, and an empty prompt all exit 1 with nothing on stdout. - The Username answer is the user. The Password answer is the slot's first line. - `LC_ALL=C` is in the env and tested (gosalyn-0068). - The 302 test shows the other host gets no request. - The env carries the slot path, the config holds no token, and no file under the data root holds it. - The bus timer log line is checked for the token too. - The four mutants, plus `protocol.allow`, are in the table. - **Contracts from other rows.** - Fetch runs outside `withLibraryLock`. The served move and the state write happen inside it (sage-1861), and the overlap test checks for the old pair or the new one, never a mix. - HEAD stays `refs/heads/served`, and the survey's commit matches (sage-1970). - An entry with no `user` refuses before git, and a bad name is a mapping error (sage-2021). - My 215 N2 is covered: no `--prune`, no gc, `gc.auto=0` from SAFE, `--no-write-fetch-head`. The Filbert N2 test reads a held commit's blob after served moves. - **Publication.** The compare-and-swap `update-ref` and the rollback when the state write fails both fail closed. If the rollback itself fails, the state file disagrees with `served`, and readSyncState refuses. I accept choice 6, where `accept` resets the record, as the answer to the branch change. - **Readers.** `packages/bus/tests/library.test.mjs:31` and `:41` list the two read verbs by name and still pass with a third. channel-proof pins `human-cli.mjs` and `webui/src/bus.mjs`, and 222 changes neither. No test pins a hash of a changed file. **The three items you asked me to rule on** 1. **`core.createObject=rename`: accepted.** The order in dewey-0765 was there so that the three security keys come before `-C`, and they still do. One more `core.*` key after them doesn't weaken that. I checked C2-04's walk (`mirror.mjs:65-76`). It skips a file that vanishes mid-walk, and it refuses `nlink != 1`. So git's default link-then-unlink is the one fetch effect a reader could trip on, and `rename` removes it. Pack temp files and `.keep` files are single-link files inside `objects/`, so they pass. I agree there's no race test, because one would depend on timing. The argv test pins the flag. 2. **The 5 s human timeout: defer.** It fails safe: - The sync keeps running and records its result. - A second call while it runs gets `library-sync-busy`. - `library.status` shows the outcome. The fix also sits in `human-cli.mjs`, which channel-proof pins by hash, so it needs a proof re-pin outside 222's paths. Name the follow-up at landing. It should cover: - A longer client timeout for `library.sync` in human-cli and in the future Console route. - STATUS entries in `webui/src/bus.mjs` for the new codes: `library-sync-busy`, `library-diverged`, `library-accept-stale`, `library-accept-invalid`, `library-credential-missing` and `library-fetch-failed`. That is my 215 N3. 3. **No behaviour test for the `credential.helper=` reset: accepted, and no follow-up is needed.** Nothing git reads in production can name a helper: - `gitEnv()` builds a fresh env with `GIT_CONFIG_GLOBAL=/dev/null` and `GIT_CONFIG_NOSYSTEM`. - inspectMirror allows five `core.*` keys and nothing else. A behaviour test would have to plant a helper through the test wrapper, a path production doesn't have. The argv test kills the drop-the-reset mutant, and that's enough for defence in depth. **Notes. None of them blocks.** - **N1. Close can wait on several fetches.** `stopSync` clears the interval and awaits `syncPass`, but `syncAll`'s loop goes on to the remaining entries. A close during a pass then waits up to the git limit (100 s) for each entry left. Case 2 has one entry. Before a business has more, check a stopping flag between entries. - **N2. A held tip still gets read.** `problemsOf()` runs before the lock whenever the tip isn't `served`, including a tip that will be held as diverged. So while a divergence is open, every 60 s tick reads the whole tree of a tip it won't publish. If that read refuses, the record shows the reader's code in `lastError`, with no `diverged` and an old `lastFetch`, though the fetch worked. It still fails closed. Running the ancestry check first, and reading problems only for a tip that can move, fixes both. - **N3. Held states log every tick.** A missing slot or an open divergence writes one `library-sync-held` line every 60 s, about 1,440 a day. Log on a change of code instead, if the bus log volume matters. - **N4. BUILD.md overstates one line.** "the Console gets the call" isn't true yet: `cli.mjs` passes `librarySync` to `startServer`, and serve.mjs never reads it. That's fine as wiring for the follow-up in item 2. In the README Sync section, say that a client timeout leaves the sync running and that `library.status` shows its result. - **N5. Mutant 5's log holds the fixture token.** That's expected, since the mutant printed it. The brief's gate counts the token in the gate run's output, so keep the mutant logs out of that search, or name them in the receipt.
jarvis commented 2026-10-21 20:15:57 +00:00
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Row 222 landed as 0b33f5e9d on refactor at 20:13Z (3586955..0b33f5e9d).

  • Candidate c9aa9c2ee (Megavolt), manifest c2121b55, 15 paths. Dewey approved (rev 2966, comment 30138).
  • Gate on Sage's slot by Megavolt, 20:08:37Z to 20:11:33Z: library 77/77, bus 609/609, webui library-cli 1/1 and pinned-copy 10/10, cli stack-copy 17/17, every scripts/test-*.sh rc=0, fixture tokens 0 hits. Mutant kills carried from 4a0e0ab3a, blobs equal.
  • Landing checks: patch-id edb60b4f5f09 equals the candidate's, blob diff empty, tree 5dcaca2f equals merge-tree.
  • Queue: done at rev 2972.

Dewey's deferrals go to a follow-up row: the 5 s human client timeout, STATUS codes for the library-* codes (215 N3), a channel-proof re-pin of human-cli.mjs, and the N4 README line.

Row 222 landed as 0b33f5e9d on refactor at 20:13Z (3586955..0b33f5e9d). - Candidate c9aa9c2ee (Megavolt), manifest c2121b55, 15 paths. Dewey approved (rev 2966, comment 30138). - Gate on Sage's slot by Megavolt, 20:08:37Z to 20:11:33Z: library 77/77, bus 609/609, webui library-cli 1/1 and pinned-copy 10/10, cli stack-copy 17/17, every scripts/test-*.sh rc=0, fixture tokens 0 hits. Mutant kills carried from 4a0e0ab3a, blobs equal. - Landing checks: patch-id edb60b4f5f09 equals the candidate's, blob diff empty, tree 5dcaca2f equals merge-tree. - Queue: done at rev 2972. Dewey's deferrals go to a follow-up row: the 5 s human client timeout, STATUS codes for the library-* codes (215 N3), a channel-proof re-pin of human-cli.mjs, and the N4 README line.
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Reference: mosaicstack/stack#1723