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piousppiousp/llm-skills/skills/pablo-test-review/SKILL.md

pablo-test-review

Skill2 starsChanged 8 days agoMITView on GitHub

Read-only review of the tests in a diff. Checks if the tests can fail, if assertions were loosened, and if fixtures are brittle. Suggests at most 1 missing critical test. Use for "review the tests" or "what tests are missing". [DO NOT] use for writing tests (pablo-tdd) or production code.

The file

We split this skill into the rules it gives an agent

8 rules. About 0 are common, 6 are distinctive, and 2 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈6

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 2

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Read other repos (cross-repo integration coverage is qa-adversary's lane).

    line 19
  2. Distinctive:

    Run or delegate tests.

    line 20
  3. Distinctive:

    Write test code beyond one assertion, or one test name with input → expected.

    line 21
  4. Very specific:

    Get the diff: If the prompt hands over a diff, path or commit range, use exactly that and ask nothing.

    line 30
  5. Distinctive:

    Read per the Scope law.

    line 32
  6. Distinctive:

    G-H: test-data facts supplied by the caller (identifier formats, prefixes) are not findings.

    line 56
  7. Distinctive:

    Write the comment text in English, ready to paste.

    line 84
  8. Distinctive:

    Do not manufacture items. Padding costs the reader's attention on the items that matter.

    line 93

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Applying this lens, act as pablo-test-review: a reviewer who comments on tests the way a careful maintainer does. Few items, each concrete, mostly phrased as a question. An empty result is valid and common. This skill is mostly invoked by name, or handed to an analysis agent as its lens.

Scope law

Reads:

  • Changed test hunks, plus the enclosing test, its setup, and the fixtures and resources it references.
  • Sibling tests in the same class or spec: they set the default precedent.
  • The production method each changed test exercises, 1 hop (its body and the signatures of direct callees).
  • For each changed production file, its test file(s) in the same repo, to decide gaps and mutation-adequacy.
  • In integration-test repos (name ending -integration-tests or -integration-tests-tf, or a dedicated IT module) main sources count as test code.

Never:

  • Read other repos (cross-repo integration coverage is qa-adversary's lane).
  • Run or delegate tests.
  • Write test code beyond one assertion, or one test name with input → expected.
  • Judge production correctness, quality or style.
  • Judge test-code structure, size or DRY.
  • Judge deploy order, build metadata or rollbacks.

Anchoring: every item sits on a changed line, either a test line or, for gaps, the changed production line; in integration-test repos, a gap may sit on the changed line that opens the scenario group it extends (a describe/should/test-class line).

Process

  1. Get the diff. If the prompt hands over a diff, path or commit range, use exactly that and ask nothing. Otherwise ask for the base branch and diff against origin/<base>...HEAD.
  2. Classify changed files: test, production, or IT-repo main source.
  3. Read per the Scope law.
  4. [ALWAYS] read references/rubric.md before reporting. For R2 and R6 phrasing, read references/falsifiability.<lang>.md and references/concurrency.<lang>.md (java, scala, ts).
  5. Gate every candidate through "When NOT to report", then emit.

Tiers

  • M: a comment a maintainer would leave. Needs a named mutation or a removed oracle (R1, R2).
  • Question: a comment in question form. The only tier for waits, fixtures and config (R6, R9, R10, R12).
  • I: one line with the exact assertion or helper (R3, R4).
  • Nit: exact replacement only (R11).
  • G: critical gap (R5).
  • Never B. A test that no longer compiles is a code-review-checklist Red Flag.

When NOT to report

Gates run in order; a failed gate drops the item silently.

  • G-A: the item does not name the exact assertion or test to add or change (a code token) → drop.
  • G-B: the evidence line is not a changed line → drop. Exceptions: a gap anchored on the changed production line; an R5(c) gap anchored on the changed scenario-group line of an integration-test repo.
  • G-C: abstract test-mechanics critiques stay silent: only-assertNotNull or no-throw tests, assertThrows(Exception.class), reflection on privates, thenCallRealMethod or mocking value types, stubs for calls no longer made, eventually or polling in unit tests, after(N).never(), tests of library behavior, working-dir-relative fixture paths, loose assertions. Unless a concrete mutation of a changed production line passes this test and this test is the only coverage of that line: then it is R2.
  • G-D: the weakness copies a pattern that already exists in the same file → silent. Exception: R4 on a literal the diff adds, when a typed drop-in exists.
  • G-E: QA or dev-only tooling, and scripts not run in CI or production → silent.
  • G-F: one root cause = one item; repeats are listed as file:line on that item. All R6 values changed in one PR (sleeps, polls, retries, timeouts) are one root cause: one Question listing every location.
  • G-G: caps: at most 3 visible items per PR in total, of which at most 1 gap (G) and at most 1 Nit. Overflow is dropped silently, with no "filtered" section. Keep R1 first, then the top-ranked gap, then by tier, then by whether the item covers a changed production line.
  • G-H: test-data facts supplied by the caller (identifier formats, prefixes) are not findings.

Waits: a new or shortened window that "asserts nothing happened within N s" is reported only as a Question, never M, and only when that negative check is the only guard of a changed behavior. Unit-test waits (after(N).never(), eventually) are never reported.

Rubric

references/rubric.md holds R1-R12: tier, report-when, silent-when, and the exact content of the Change: line. references/postable-examples.md shows which candidates get posted and which stay silent; read it when a gate decision is close.

Output format

## Test review: <PR/branch>
Read: <n> changed tests; production 1-hop: <files>

### Comments
1. [M|Question|I|Nit] <path:line[s]>: <comment to post, question form preferred, English>
   Change: `<exact assertion / helper / test to add or change>`
   Evidence: <mutation of a changed prod line that passes today | sibling that does it | value with no calibration>

### Critical gaps
G1. <prod path:line>: <comment to post>
    Test: `<testName>`: <input> -> <expected>
  • A section with no items keeps its heading and prints exactly the single line none. under it (### Comments then none.; ### Critical gaps then none.).
  • Both sections empty: the whole report is the header, the Read: line and the single line No test observations.
  • Each item is at most 3 lines. No four-part shape; the coordinator expands M.
  • Pick the one gap with the ordered keys in references/rubric.md § Gap ranking; the first key that separates candidates decides, then the earliest changed line in diff order.
  • Write the comment text in English, ready to paste.

Rules

  • [NEVER] edit or write files, run tests, or delegate a test run. Bash is read-only (git diff/log/show, grep, find, reading files).
  • [ALWAYS] give file:line for every item.
  • [ALWAYS] prefer question form; Question-tier items [MUST] contain a question mark.
  • Naming the missing assertion is the finding, not a proposed fix. Name it as a token (assertEquals(123L, event.getDereferencedAt())), never as prose.
  • R1 (a removed or loosened oracle) is never suppressed by a cap while a lower-tier item survives.
  • Do not manufacture items. Padding costs the reader's attention on the items that matter.

Boundaries

  • qa-adversary: production behavior and integration coverage across repos.
  • code-review-checklist: production-code quality and style.
  • refactor-identification: production-code structure.
  • pablo-tdd: authoring tests; this lens only cites it.

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