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Adversarial senior review of the spec before any code is written.

Skill by JuliusBrussee

IndexedMIT★ 1,157
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About

Adversarial senior review of the spec before any code is written. Constructs a skeptical reviewer whose authority comes from the codebase, §R research, and live best-practice — then tries to REFUTE the spec, not rubber-stamp it. Every finding cites evidence (file:line or source); unverifiable ones are flagged. Survivors harden §V; the run ends in an explicit go / no-go gate. Triggers before building anything high-blast-radius, when the user says "review the spec", "red-team this", "is this plan sound", "senior review", or invokes /ck:review.

Use cases: research

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What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

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  • codeload.github.com · found in install command

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  • ~/.claude/skills/review

What's inside

Skill name
review
Description
Adversarial senior review of the spec before any code is written. Constructs a skeptical reviewer whose authority comes from the codebase, §R research, and live best-practice — then tries to REFUTE the spec, not rubber-stamp it. Every finding cites evidence (file:line or source); unverifiable ones are flagged. Survivors harden §V; the run ends in an explicit go / no-go gate. Triggers before building anything high-blast-radius, when the user says "review the spec", "red-team this", "is this plan sound", "senior review", or invokes /ck:review.
License
MIT
Instructions
74 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

# review — refute the spec before build

**Every finding cites evidence — file:line or a source. No evidence → flag `[unverified]`. Default to refuted: a flaw you cannot prove is a flaw you note, not one you wave through.**

An LLM cannot self-correct on its own judgment — left alone it drifts or
degrades. Review fixes that the only way that works: a *separate* skeptic
anchored to an *external oracle* — the code, §R, the test suite, the docs.
"Looks good" is not a review. A refutation attempt is.

## WHEN TO REVIEW

- Before `/build` on a high-blast-radius change (shared module, auth, data, money, public API).
- Spec touched §I or §V that other code depends on.
- Right-sizing says the cost of a wrong build > the cost of one review pass.

Skip for a trivial, reversible, well-understood change. Adversarial review on a
typo hallucinates flaws & wastes the budget — the self-critique paradox is real.

## PHASE 0 — CAPTURE

Read the spec: §G §C §I §R §V §T. Hold the whole thing. You review the *spec*,
not your memory of the conversation.

## PHASE 1 — CONSTRUCT THE SENIOR

Build a reviewer with real authority, not a generic critic:
- **Codebase** — grep/read the modules this spec touches. What patterns, what invariants already hold?
- **§R** — what did research establish? A spec decision that contradicts §R is a finding.
- **Live** — for any best-practice claim you are unsure of, fetch it. An out-of-date assumption is a flaw.

A reviewer with no evidence is just an opinion. Earn the authority first.

## PHASE 2 — REFUTE

Attack the spec on these axes. For each, try to find the case where it breaks:
- **Goal vs reality** — does §G solve the actual problem, or a proxy?
- **Missing invariant** — what can go wrong that no §V catches? (most findings live here)
- **Interface drift** — does §I match what callers already expect? (cite the caller, file:line)
- **Constraint conflict** — do two §C bullets contradict? does one fight §R?
- **Unowned edge** — the input, ordering, failure, or concurrency case no §T covers.
- **Altitude** — §T too vague to act on, or so granular it is just typing?

## PHASE 3 — CLASSIFY

Each finding: `evidence → claim → severity`.
- **BLOCK** — build on this spec ships a real defect. Must fix first.
- **HARDEN** — add/sharpen a §V so the build cannot regress it.
- **NOTE** — worth knowing, not blocking.

No evidence? Down-rank to NOTE & tag `[unverified]`. ⊥ inflate a hunch to BLOCK.

## PHASE 4 — HARDEN §V & GATE

- Each HARDEN finding → a draft §V line (testable, cites the §I/behavior it guards). Hand to **spec** to write.
- End on an explicit gate:

```
## review verdict
BLOCK: 1 — §I.api shape ≠ caller src/client.ts:40. fix §I before build.
HARDEN: 2 — drafted V8 (idempotent refund), V9 (tx around dual write).
NOTE: 1 — §T4 vague, split before /build.
gate: NO-GO until BLOCK cleared. then /build §T after spec writes V8,V9.
```

GO or NO-GO, never a shrug. Review is the checkpoint that stops a confident wrong build.

## BOUNDARIES

- ⊥ write SPEC.md. Draft §V & hand to spec.
- ⊥ pass a finding with no evidence as fact. Flag `[unverified]`.
- ⊥ review trivia. Right-size or skip.
- ⊥ rewrite the user's intent. You harden the spec, you do not replace its goal.

From JuliusBrussee/cavekit, MIT.

Signals

Stars
1,157
Forks
89
Open issues
12
Last commit (this folder)
Jun 18, 2026 (4 months ago)
Last release
Apr 18, 2026 (6 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

More from JuliusBrussee

Cite this page

review skill. Agent Mart. https://agentmart.dev/skills/juliusbrussee-review (last updated 2026-10-24)