feat: autonomous (cron) session turn cap#17
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CLI --max-turns ceiling + advisory prompt contract + session_budget_stop runlog classification for cron/sdk sessions. Scoped per brainstorming; interactive covered by the shipped UserPromptSubmit guard. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…ering - sdk source doesn't exist yet; scope v1 to source=='cron' (web/api uses dispatchWebSessionRun, separate design) - rate-limit retry engine.run must carry maxTurns + re-classify; Codex fallback advisory-only (no hard cap) - classify error_max_turns FIRST, before dead-session/rate-limit handling - intentional no transient-retry on error_max_turns in ClaudeEngine.run - append budget contract AFTER pre-session hooks (hook may replace prompt) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
7 TDD tasks: schema, budget.ts core (tested), --max-turns arg, subtype capture + no-retry, runSession wiring (incl. retry path), runner runlog + alert, end-to-end smoke. Full code per step. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…gineResult.subtype, CronJob.maxTurns/sessionBudget, sessions.budget)
…dget stop (incl. retry path)
…p runlog, conditional ops alert
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Caps autonomous cron Claude sessions via the CLI's
--max-turnsceiling + anadvisory prompt contract, and classifies a ceiling-hit as a distinct
session_budget_stop(not a generic error). Targets the marathon-session spendconcentration (top ~2% of sessions ≈ 80% of cost; ≥200-turn sessions ≈ 90%).
Design:
docs/superpowers/specs/2026-06-03-autonomous-session-turn-cap-design.mdPlan:
docs/superpowers/plans/2026-06-03-autonomous-session-turn-cap.mdWhat it does
sessions/budget.ts: cap resolution, contract prompt, stop classification (unit-tested).--max-turns <cap>passed to the Claude CLI for cron sessions; default 300,per-job
maxTurnsoverride, opt-out viasessionBudget.hardCap:false.result.subtype === "error_max_turns"(never turn count), before dead-session/rate-limit handling; carried through
the rate-limit retry path. Codex fallback is advisory-only (no hard cap).
EngineResult.subtypenow captured generically;ClaudeEngine.runnevertransient-retries a budget stop.
session_budget_stop(distinct fromsuccess/error) + ops alertonly for
sessionBudget.sideEffects:truejobs.Scope
dispatchWebSessionRun(separate path);interactive is covered by the shipped
UserPromptSubmitguard.sdksourcedoesn't exist yet. No continuation-artifact schema in v1 (deferred to steward data).
Known gap (documented)
A mutating cron without
sessionBudget.sideEffects:trueproduces a runlog-only(Telegram-silent) budget stop. Owners of write/deliver jobs must opt in.
Testing
budget.test.ts+--max-turnsarg cases added); typecheck clean.maxTurns:3throwaway cron:runlog →
{"status":"session_budget_stop","maxTurns":3,"actualTurns":4},session row →
interrupted | session_budget_stop: hit max-turns cap (3),ops-alert fired (sideEffects-gated). Throwaway job removed (byte-exact restore).
🤖 Generated with Claude Code