evolve

A command that investigates a bug or issue and writes a proposal for improving the coding-agent setup. The proposal is reviewed and applied later by a person.

In plain words
What is it for?
Use it to replay workflow records, identify root causes, simulate a better rule or behavior, and save the suggested harness change for review.
Why use it?
It helps explain why a workflow failed and captures a concrete prevention idea without changing the setup automatically.

Command

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 commands/shenchangmin/cairnkit/evolve
Clone the repo
git clone --depth 1 https://github.com/shenchangmin/cairnkit
Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 226 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 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 $0.00022 $0.00226
Opus 5 $0.00011 $0.00113
Sonnet 5 $0.00004 $0.00045
Haiku 4.5 $0.00002 $0.00023

Measured yesterday against content hash 3d6d7ead7de6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

evolve scanned grade A with 0 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/evolve.md · 25 lines

What it actually says

/evolve

Diagnose a problem and propose a harness improvement. This never changes the harness — it only writes a proposal for later human review.

Steps

  1. Replay the relevant workflow log/artifacts under docs/workflows/<run-id>/ and do root-cause analysis.
  2. Simulate the improved behavior in context (what would the agent/rule have needed?).
  3. Write the analysis + concrete suggested change, then record it: cairn --root . evolve propose --id <slug> --file <analysis.md>

Do not send a notification or any other external message unless the user separately identifies the target and explicitly requests it in this interaction. Recording the local proposal does not authorize a webhook or channel message.

The proposal lands in docs/workflows/evolve-log/pending/. Apply it only via the guarded evolve-apply entrypoint.

The issue to analyze: $ARGUMENTS

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 · 25 lines · 22 tokens per session scan A 3d6d7ead7de6

Subscribe to this mod's changes

evolve is a command published in the GitHub repository shenchangmin/cairnkit (1 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 226 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.