capability-evolver

Capability Evolver

This plugin gives the agent a persistent, auditable evolution memory built on the Genome Evolution Protocol (GEP). The goal is simple: stop re-solving the same problem from scratch. Past outcomes — what worked, what failed — are carried forward into future sessions.

How it works (automatic)

Three hooks run on their own; you don't invoke them:

• SessionStart — injects a short summary of recent successful outcomes for this workspace (filtered to score ≥ 0.5, < 7 days old, max 3) as context. The agent sees "here's what worked recently" before it starts.
• PostToolUse (Write/Edit) — scans edits for improvement signals (log_error, perf_bottleneck, capability_gap, test_failure, …) and nudges the agent to record the outcome when relevant.
• Stop — at the end of a task, collects the git diff, classifies the outcome, and appends it to the evolution memory graph (scoped to the workspace so other projects' memory never leaks in).

Memory is written to a local JSONL graph. With no extra setup it lands in ~/.evolver/memory/evolution/memory_graph.jsonl; inside an evolver-managed project it lands under that project's memory/evolution/.

What you (the agent) should do

For any substantive task — a feature, a non-trivial fix, a refactor:

1. Before starting, check the injected evolution memory (it arrives as session-start context). If a recent successful outcome matches the task, reuse that approach. If a recent failure matches, avoid repeating it.
2. Do the work.
3. After finishing, the Stop hook records the outcome automatically. You don't need to call anything — but if the task had a clear lesson worth a one-line note, say so in your final message so it's captured in the diff context the hook reads.

Trivial or purely conversational turns don't need this — skip it.

Signals

The hooks classify work by signal. Knowing the vocabulary helps you describe outcomes in terms the memory graph indexes well:

Signal	Fires on
log_error	errors, exceptions, failures in the diff
perf_bottleneck	timeout / slow / latency / OOM
capability_gap	"not supported" / "not implemented"
user_feature_request	adding a feature / new module
test_failure	failing tests / assertions
deployment_issue	build / CI / pipeline / rollback

Full pipeline (optional)

The bundled hooks record outcomes and recall them — that works on its own. To get the full evolution engine (automated log analysis, the review-and-solidify cycle that proposes and applies code improvements), install it:

npm install -g @evomap/evolver

This gives you the engine's CLI (e.g. evolver run, surfaced by the /evolver:run command) to run that pipeline separately — the hooks do not auto-detect or invoke it. The memory the hooks record is what the pipeline consumes. See the plugin README for connecting an EvoMap Hub node for community strategies.

MCP tools

This plugin bundles a lightweight MCP bridge (evolver-proxy) exposing the local EvoMap Proxy mailbox:

• evolver_search_assets — find reusable genes/capsules by signal. Call this before substantive work to reuse proven approaches instead of reinventing them.
• evolver_status — Proxy state (node id, pending counts, last sync).
• evolver_fetch_asset / evolver_publish_asset / evolver_distill_conversation / evolver_poll.

Use evolver_distill_conversation only when the current conversation produced a concrete reusable capability. Include a summary, strategy steps, artifact paths/links, and validation evidence so the Proxy can reject weak or noisy candidates.

The tools degrade gracefully when the Proxy isn't running (the local memory hooks still work). The richer, full gep_* surface is the separate @evomap/gep-mcp-server — add it to your MCP config if you want it; the two compose.