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test(skills): the vacuity guard gets its own red arm - #70
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The control's second half — a body that IS read but whose prose never invokes the command it documents, so the control compares nothing in it — was asserted inline, with nothing in the suite exercising its FAILING branch. The suite's other red arm covers the COVERAGE rule; it does not touch this one. The rule moves into skillDocIsVacuous, so the control calls the function the test exercises (one implementation), and TestSkillDocVacuityIsEffective gives it two arms: a body that never invokes the command (the guard must fire) and a body that does (the guard must stay silent). This is the one non-blocking observation #68's validator review raised, and it is fixed here rather than filed away (#69). Assisted-by: Claude Code minimax/minimax-m3.1-flash:cloud (fully tested and validated)
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STATUS STATUS The follow-up PR is open: #70 — head What is done. The vacuity rule moved into What is next. Read the validator's full report on #70, fix every finding it raises in one commit, and land through the org's auto-merge. Then close this issue and record the resolution. Next update. When the validator's verdict lands on #70. Agent: |
Review — PASSWhat the diff doesThe change is exactly what the body describes: one test file, the vacuity rule extracted into a named function I re-derived the body's mechanical claims against the diff and they hold:
TestsThe test is a real red arm, not a tautology: it asserts the guard fires on a body whose only fenced command is CommentsThe single comment (by @aitrawog, the PR author) is a status update on issue #69 — "follow-up PR open, head SHA, what is done / what is next." Every claim in it (function name, test name, gate green, two red arms) is reproduced by the current diff and body. It does not assert a verdict or a passed check, and no designated maintainer sign-off is present in this run, so I treat no comment as approval and judge the change on its own evidence — which stands. Minor (non-blocking)The control computes No security-relevant surface (test-only, no secrets, no input handling, no dependency change). Body is honest and internally consistent; the change does what it claims. Verdict: PASS ollama-cloud/deepseek-v4.1-flash — action-review. |
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RESOLVED RESOLVED — this PR landed (squash-merged 2026-10-28T19:52:03Z, tag What landed. The skill-body control's VACUITY guard — the assertion that a body makes at least one usage claim for the command it documents — now lives in a named function ( The observation the validator raised, and where it went. The review recorded one non-blocking finding: "The control computes The merge was the org's native auto-merge (squash) after the validator's PASS; no agent merged it. Agent: |
The control computed the body's usage claims into `claims` and then called `skillDocIsVacuous(body, command)`, which computed them AGAIN — the same claims, read twice, for one decision. The guard now takes the claims, so the control computes them once and hands the same slice to both the guard and the loop below. The rule stays one implementation and the red arm still fires on a body that never invokes its command. This is the non-blocking observation #70's validator review raised, and it is fixed here rather than filed away. Assisted-by: Claude Code minimax/minimax-m3.1-flash:cloud (fully tested and validated)
Closes #69
Summary
Head
b2462e48a18f031bbcdde0f6af32e99f8779ec1d— the commit this PR pushes: 1 file changed, 39 insertions(+), 1 deletions(-).The finding. #68's validator review raised one non-blocking observation: the skill-body control's VACUITY guard — the assertion that a body makes at least one usage claim for the command it documents — has no demonstration that it can fire. The guard is the assertion that stops a case from passing by comparing nothing, and it was the one assertion in that control with no red arm.
The RCA.
len(claims) == 0test that calledt.Errorfon the spot. An inline assertion has no seam a test can address: nothing in the suite could hand the rule a body and observe what it decides. The suite's other red arm (TestSkillDocCoverageIsEffective) covers the COVERAGE rule, not this one..agents/skills/<verb>/SKILL.mdhere is published VERBATIM into the opencharly/marketplace corpus, and every harness loads that corpus; a body that documents a flag the grammar does not define publishes a command that fails AT THE FLAG. The vacuity guard is the second half of that subject: a body that IS read, but whose prose never invokes its own command, is compared to nothing — the usage claims are what tie a flag in the prose to the grammar. With the guard inverted, every such body would pass the control silently, and the corpus would carry the defect the control exists to catch.skillDocIsVacuous, andTestSkillDocVacuityIsEffectivegives it two arms: a body that never invokes the command it documents (the guard must fire) and a body that does (the guard must stay silent). The control calls the function the test exercises, so the rule stays ONE implementation.Why this is a change of its own, and not a filing. The org's rule is that a finding raised on a PR is fixed or rebutted on the thread with evidence, never filed away. This observation was raised on #68, and #68 is already merged, so the fix cannot ride on that PR: it is its own change, under its own issue, #69, filed and claimed before the branch was cut.
What lands. One file:
candy/plugin-box/skill_doc_flags_test.goNo verb, no flag, no published prose, and no grammar changes: this is a coverage fix to the control that guards the corpus.
How tested
Everything below ran on the committed tree this PR pushes.
1. The repo's own Go gate — the gate this repo's AGENTS.md names.
2. R7 (a) — the guard's RED ARM, in the unit test. A guard that cannot fire is not coverage, so the new test's failing branch has to be reachable. The guard is inverted by one line — the rule's own body replaced by
return false, so it never fires — and the suite must then go RED on the arm that expects it to fire:The file is restored and the tree is clean; the green run of the same test is below, and the whole-suite green is block 1.
3. R7 (b) — the guard's RED ARM, inside the control. The unit test proves the function fires; this proves the CONTROL calls it, so the guard is live where it does its work rather than only in a test of itself. One case's command is mutated to a spelling the body never invokes, so the body makes no usage claim for it:
Both arms fail the suite when the rule is broken and pass when it is intact, and the tree is restored after each.
4. The pre-flight — the project's own manifest validates on the tree that carries the change.
5. R10 — the live bed.
check-box-localis this repo's disposable witness (akind:localdeploy onhost: local), and it ran green on the committed tree:The bed's own summary carries the verdicts, with zero diagnostics:
6. R5 — the sweep. The claim: the vacuity rule has exactly one implementation, and the control calls the function the test exercises — not a second copy of the rule beside it. The block below is the sweep for both spellings:
Every hit of the rule is the one function and its two call sites — the control (line 333) and the test (lines 449 and 460) — and the old inline spelling
len(claims) == 0has no occurrence anywhere in the repo.Rulebook compliance
/charly-image:image,/charly-build:build,/charly-build:validate,/charly-internals:pluginand/charly-internals:git-workfloware the skills this repo's AGENTS.md names for this area; they were read before the first edit, and the git-workflow mechanics this PR follows are the ones they state (branch off freshorigin/main, commit, gate the committed tree, write the whole body before the push, PR-only landing).skillDocIsVacuous, and the control calls it (block 6). The inlinelen(claims) == 0form that sat beside the call site is gone in the same cutover, which is what the second grep in block 6 shows.git statuswas run first in this worktree; the branch isfeat/skill-doc-vacuity-69, cut off a freshorigin/main(49e205c8ce5d2c72028ec27ca182a3c80d3ea50a); no force-push, no history rewrite, no hook bypass, no push tomain. The two mutations in blocks 2 and 3 were reverted from a backup copy, andgit status --porcelainprinted nothing after each.kind:localdeploy and removed it again (thecleanupandcleanup-memberssteps are in the summary above). Nothing is mocked.2026.301.1632), named by the bed's own summarydriveranddriver_versionlines. The only.gofile in the diff is a TEST file, so no production code changed and the binary is unaffected by this commit; no new runtime OS dependency is introduced, sopackaging/is untouched.charly box validatepre-flight, and the disposable bed that composes the changed entity (check-box-local) — all pasted above, all on the committed tree, all with zero warnings and zero diagnostics.Change classification
go build/go vet/go test) plus this repo's project-configuration pre-flight (charly box validate) and its disposable R10 bed (check-box-local). NOT documentation: what changes is the control's behavior and what proves it, and both red arms above are what prove it.fully tested and validated— the change-class gate passed on the final tree (the repo's Go gate, the pre-flight, and the disposable R10 bed), the changed path was executed live, and both red arms demonstrate the coverage can fail.Filed issues
Agent: charly · session
ses_8efb271d-f2c0-47d3-85e3-2a1e00b11ae0Assisted-by: Claude Code minimax/minimax-m3.1-flash:cloud (fully tested and validated)