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: