lifecycle

Instructions for tracking an agent session through states such as working, blocked, reviewing, merged, or done. A session state records what stage the work has reached.

In plain words
What is it for?
Changing an agent's state, checking its current state, and defining reactions between states such as blocked and working.
Why use it?
It makes progress and problems visible and provides named transitions for reacting when an agent's situation changes.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/iii-experimental/agentos/lifecycle
Any agent
npx skills add iii-experimental/agentos --skill lifecycle
Clone the repo
git clone --depth 1 https://github.com/iii-experimental/agentos

Made for: Claude Code, Codex.

Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 190 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00013 $0.00190
Opus 5 $0.00006 $0.00095
Sonnet 5 $0.00003 $0.00038
Haiku 4.5 $0.00001 $0.00019

Measured yesterday against content hash 1764b11d5f22, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

lifecycle scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

- Transition: `curl -X POST http://localhost:3111/api/lifecycle/transition -H 'Content-Type: application/json' -d '{"agentId": "claude-code", "newState": "working"}'`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- Transition: `curl -X POST http://localhost:3111/api/lifecycle/transition -H 'Content-Type: application/json' -d '{"agentId": "claude-code", "newState": "working"}'`
plugin/skills/lifecycle/SKILL.md · 15 lines

What it actually says

Manage agent session lifecycle:

  • Transition: curl -X POST http://localhost:3111/api/lifecycle/transition -H 'Content-Type: application/json' -d '{"agentId": "claude-code", "newState": "working"}'
  • Get state: curl http://localhost:3111/api/lifecycle/state/claude-code
  • Add reaction: curl -X POST http://localhost:3111/api/lifecycle/reactions -H 'Content-Type: application/json' -d '{"agentId": "claude-code", "from": "blocked", "to": "working", "action": "notify"}'

States: spawning -> working -> blocked -> pr_open -> review -> merged -> done | failed -> recovering | terminated.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 15 lines · 13 tokens per session scan B 1764b11d5f22

Subscribe to this mod's changes

lifecycle is a skill published in the GitHub repository iii-experimental/agentos (162 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 13 tokens to every session and 190 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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