dsh-review

dsh-review

Packaged multi-agent adversarial code review for DeepSeek Harness.

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Status: M0 — the review tool works end to end.

The problem

dsh ships the primitives for multi-agent work — subagents, workflows, ralph loops — but nothing that packages them into a review you can trust. Run naive parallel reviewers over a diff and you get a wall of plausible-sounding findings, most of them wrong; triaging them costs more than the review saved. "AI code review produces too many false positives" is the reason people stop using it.

The method

Two stages, and the second is the one that matters:

1. Find — several reviewers in parallel, each with a distinct lens (correctness, lifecycle/concurrency, API-contract conformance, security), each reporting findings with a concrete failure scenario rather than a style opinion.
2. Verify adversarially — every finding gets its own verifier whose job is to *refute* it: read the real code, reproduce if possible, and default to "not real" when the evidence is ambiguous. Only survivors are reported.

Measured on this repo's two sibling plugins (dsh-preview, dsh-pilot): 73 agents, 49 confirmed findings, 14 refuted. Two of the confirmed ones were only established because a verifier wrote a script and reproduced the failure — including a defect where the agent silently clicked the wrong same-named button on shadow-DOM pages.

Install

dsh plugin --profile web add dsh-review

Requires a composed subagent provider (the stock spawn provider in dsh-base is the default) and Node ^22.19 || >=24.

Use

One tool, review. It is the most expensive thing in a session — every lens is an agent and every finding costs another — so it is a pre-release audit, not a per-commit check. A full run on a real change took minutes and a double-digit number of agents in our own use; budget for that, and use depth: quick when you want a cheap look at a small change.

Describe the target the way you would brief a colleague who has the repository but not the context:

Review the uncommitted changes in src/policy.ts and src/index.ts (run git diff).
They add an origin gate that must follow the session's approval stance: a session
with approval policy 'never' passes silently, an 'ask' session is prompted once
per origin, and a grant must never leak to another session.

The tool returns confirmed findings — file, line, what is wrong, the failure scenario, and a suggested fix — plus the titles of findings that were refuted, so you can see what the verification stage filtered out rather than wondering what it missed.

review { target: "...", depth: "quick" }

quick caps the run at two lenses, four verified findings, and one verifier — roughly a third of the cost. Verification runs at both depths: a cheaper review looks at less rather than trusting more, because reporting an unverified claim is the failure this plugin exists to avoid.

The bundled adversarial-review skill teaches the agent when a review is worth its cost and how to act on the two categories differently.

What this has not been measured against

The evidence here is that the method finds real defects — 49 confirmed across the sibling plugins, several reproduced by a verifier writing a script. What has not been measured is whether it beats simply asking the model to review the same diff: no A/B, no false-positive rate against a baseline. Treat the refutation stage as a design argument backed by observed refusals (14 findings dropped), not as a proven improvement over the obvious alternative.

Configuration

- id: review
  name: dsh-review
  config:
    subagentProvider: spawn   # which composed provider runs the children
    lenses: []                # [] runs every built-in lens
    verifiersPerFinding: 1    # raise for a stricter panel; all must confirm
    maxFindings: 12           # verification budget, worst severities first
    maxConcurrentChildren: 8  # cap on children running at once
    maxDepth: 2               # delegation-depth cap for review children
    registerSkill: true

Lenses: correctness, lifecycle, contract, security. Each is one child agent, and each finding costs verifiersPerFinding more — a review is the most expensive tool in a session, which is why the skill tells the model to use it deliberately.

Design notes

• Silence is reported, not implied. A lens that ran and found nothing is listed as such, separately from one that failed — otherwise a caller cannot tell coverage from absence, which the plugin's own first quick run made obvious.
• Failures are contained per child. A finder that dies costs its lens and is reported as a coverage gap; a verifier that dies refutes its finding, because a claim nobody verified is exactly what this plugin exists not to print.
• Verification is unanimous. With verifiersPerFinding > 1, one refutation is enough to drop a finding — the asymmetry is deliberate.
• The budget cuts the least severe. Findings are verified worst-first, and anything cut is reported as dropped rather than silently omitted.
• Fan-out is bounded. Every child start passes through one limiter, so a large budget queues instead of firing hundreds of agents at once — an overload would otherwise arrive disguised as a review that refuted everything.

Dogfooding

dsh-review reviewed its own source and found three defects, which are fixed and pinned by tests: a zero dedupeThreshold merged every finding in a file (distinct defects silently discarded as duplicates), the verifier fan-out had no concurrency bound, and maxDepth was the one numeric config never validated at load. It also refuted two findings, one of which was a genuine false positive about a value the entry point already validates.

Family

License

MIT © Viger1