Awesome Reviewers

When implementing algorithmic logic (parsing, path transforms, selection/slicing, or cost/estimate functions), treat correctness and runtime bounds as first-class requirements.

Apply this standard: 1) State the invariant explicitly

• Define what gets counted and when (e.g., “only after the newest real prompt” vs. earlier turns).
• Define precedence rules (e.g., disabled overrides enabled: false).
• Define structural boundaries (e.g., how many lines a top-level YAML entry spans so inline comments attach correctly).
• Define path semantics (e.g., POSIX conversion must not change filenames that legitimately contain backslashes).

2) Avoid naive scaling/assumptions; cap complexity/cost

• For estimators, make the function depend on the intended drivers (e.g., image count) rather than incidental payload size.
• For potentially large inputs/archives, enforce explicit size limits and bounded recursion/depth.
• Avoid pathological regex patterns that can cause backtracking blowups.

3) Add targeted tests that break naive implementations

• Estimation: verify independence from large payload size and correct scaling with count.
• Parsing: verify precedence and boundary inclusion (block scalars, comments, re-enabling).
• Transforms: verify edge-case filenames (literal backslashes).
• Selection/slicing: verify earlier-state cannot affect later verification.

Example pattern (estimation should be count-based, not payload-based):

const ESTIMATED_TOKENS_PER_IMAGE = 123;

function estimateTokensForImages(content: Array<{type: string; data?: string}>) {
  const imageCount = content.filter(b => b.type === 'image').length;
  return imageCount * ESTIMATED_TOKENS_PER_IMAGE;
}

Back it with tests that compare a huge base64 payload vs. a small one (same count → same estimate) and verify the estimate scales ~linearly with image count.

This combination prevents both subtle semantic bugs and worst-case performance surprises in the algorithmic parts of the system.

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