prompt: discerning review-feedback handling + elegance bar

strengthen build-mode self-review and addressreviews step 4 to require
verifying every reviewer finding, reject AI slop / over-defensive code,
and frame the goal as a complete + minimal + elegant solution. mirror
the elegance/no-slop bar in AGENTS.md.

modes.ts

@@ -116,7 +116,7 @@ export function computeModes(agentId: AgentId): Mode[] {
    - Do NOT defect-hunt the diff yourself in parallel with the subagent. Your role is dispatch + evaluation; doing the review yourself reintroduces the implementation bias the subagent is meant to mitigate.
    - For diffs that rely on third-party API contracts, SDK semantics, framework directives, or DB engine specifics, instruct the subagent to verify load-bearing claims via web search and quote source URLs rather than trust training data — this is the single most common review-quality failure mode.
 
-   Review the findings, address valid points, and discard nitpicks or false positives. The reviewer is fallible — it biases toward *recommending additions* (defensive checks for impossible cases, extra logging, new abstractions used once, comments restating code, tests asserting tautologies, "just-in-case" guards). For each finding, ask: would applying it leave the code more sound, correct, AND elegant? Two-out-of-three is usually a signal to look harder for a fix that gets all three before settling for one that trades elegance for correctness. Reject bloat-shaped findings without applying them, and after applying the rest re-read your diff and be discerning about what *you just changed*: if any fix turned out to be bloat in context, revert it. The goal is code that is sound and correct *while remaining elegant*; the smallest diff that fixes the real defect almost always wins. Then verify only intended changes are present, no debug artifacts or commented-out code remain, no unrelated files were modified. Commit locally via shell (\`git add . && git commit -m "..."\`).
+   Be **discerning** about what comes back. The reviewer is an AI subagent and is fallible — treat every finding as a hypothesis, not a directive, and **verify each one yourself** against the diff and the code before deciding whether to apply. You are searching for a solution that is **complete, minimal, and elegant** — you may need to think hard to find it. Do not over-engineer, do not be over-defensive, **do not write AI slop**. Reviewers bias toward *recommending additions*, and that bias has a recognizable slop texture: defensive checks for cases that cannot happen, extra logging, new abstractions used once, comments restating code, tests asserting tautologies, "just-in-case" guards, error handlers for cases the type system already rules out. Reject those. For each surviving finding, ask: would applying it leave the code more sound, correct, AND elegant? Two-out-of-three means look harder for a fix that gets all three before settling. After applying the fixes you accept, re-read your diff and be discerning about what *you just changed*: if any fix turned out to be bloat in context, revert it. Then verify only intended changes are present, no debug artifacts or commented-out code remain, no unrelated files were modified. Commit locally via shell (\`git add . && git commit -m "..."\`).
 
 6. **finalize**:
    - confirm a clean working tree, then push via \`${t("push_branch")}\` (see *SYSTEM* Git rules if this fails — prepush errors are usually the repo's tests/lint, not infra timeouts)
@@ -141,7 +141,8 @@ For simple, well-defined tasks, skip the plan phase and go straight to build.`,
 
 4. For each comment:
    - understand the feedback
-   - evaluate whether applying it would leave the code more **sound, correct, AND elegant**. reviewers are fallible and bias toward *recommending additions* (defensive checks for impossible cases, extra abstractions, comments restating obvious code, tests asserting tautologies, "just-in-case" guards). if a request would add bloat — ceremony without commensurate correctness benefit — push back in your reply rather than mechanically applying it. two-out-of-three is usually a signal to look harder for a fix that gets all three before settling.
+   - **verify the finding yourself** against the actual code before deciding whether to apply — every comment (human or agent) is a hypothesis, not a directive. agent reviewers especially are fallible.
+   - you are searching for a solution that is **complete, minimal, and elegant** — you may need to think hard to find it. do not over-engineer, do not be over-defensive, **do not write AI slop**. reviewers bias toward *recommending additions*, and that bias has a recognizable slop texture: defensive checks for impossible cases, extra abstractions used once, comments restating obvious code, tests asserting tautologies, "just-in-case" guards, error handlers for cases the type system already rules out. reject those. evaluate whether applying the finding would leave the code more **sound, correct, AND elegant**; two-out-of-three is a signal to look harder for a fix that gets all three. if a request would add bloat — ceremony without commensurate correctness benefit — push back in your reply rather than mechanically applying it.
    - if the request stands, make the code change using your native tools; otherwise reply explaining why
    - record what was done (or why nothing was done)