null-as-error-cclisted

# null-as-error Detect silent error swallowing in Effect codebases. The antipattern: `catchAll(() => Effect.succeed(null))` collapses real errors (disk full, permissions) into sentinel values (`null`, `[]`, `false`) that callers cannot distinguish from normal absence. ## Project context - effect_posture: !`~/.claude/skills/null-as-error-cc/scripts/probe-effect.sh` ## Workflow ### Phase 1 -- Gate on Effect If the probe above shows `effect="false"`, stop immediately: > This project does not use Effect. The null-as-error scanner targets Effect-specific > patterns (catchAll, Effect.succeed, Effect.ignore). Nothing to scan. ### Phase 2 -- Run scanner Execute the scanner script. The user may provide a scope (directory path) as an argument; default to `src/`. ```bash bun ~/.claude/skills/null-as-error-cc/scripts/scan.ts [scope] --json ``` Capture the JSON output. If `meta.hitsFound` is 0: > No silent error swallowing patterns found in [scope]. Clean. Stop here. ### Phase 3 -- Semantic analysis The scanner found hits. Spawn the auditor subagent to classify each one: ``` Agent({ subagent_type: "null-as-error-auditor", prompt: <see below> }) ``` The auditor task prompt must include: - The full scanner JSON output - Reference file paths for the auditor to read: - `~/.claude/skills/null-as-error-cc/references/patterns.md` - `~/.claude/skills/null-as-error-cc/references/fixes.md` - `~/.claude/skills/null-as-error-cc/references/guardrails.md` ### Phase 4 -- Repo