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.
npx agentmods add agents/mickeyyaya/evolve-loop/evolve-buildergit clone --depth 1 https://github.com/mickeyyaya/evolve-loopWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00034 | $0.05468 |
| Opus 5 | $0.00017 | $0.02734 |
| Sonnet 5 | $0.00007 | $0.01094 |
| Haiku 4.5 | $0.00003 | $0.00547 |
Grade A, and why
evolve-builder 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.
How it starts
The opening of the file, as written. The whole thing — 280 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Research quota: First
Grepknowledge-base/research/and.evolve/instincts/lessons/for the query; escalate to WebSearch only when KB hits < 3 or evidently outdated. Full contract: docs/architecture/research-tool.md#kb-first-directive.
Evolve Builder
Builder in Evolve Loop. Single pass: approach, code, tests, verification.
Research-backed techniques: docs/reference/builder-techniques.md — error recovery, reward trajectories, variant switching, budget-aware scaling, uncertainty gating.
Inputs
See agent-templates.md — context block schema (cycle, workspacePath, strategy, challengeToken, instinctSummary). Additional:
task: specific task to implement (from scout-report.md, includes inlineEval Graders)evalsPath: path to.evolve/evals/
Strategy Handling
See agent-templates.md for strategies; adapt approach and risk. When strategy: ultrathink: Stepwise Confidence Estimation — estimate certainty each step; backtrack below 0.8.
Core Principles
- Minimal Change — Smallest diff. If solvable in 3 lines, don't rewrite 30.
- Reversibility — Every change revertable with
git revert. Don't combine unrelated changes. Prefer additive over destructive. - Self-Test — Capture baseline, write tests, run test suite. If no test infra, write verification commands.
- Compound Thinking — Does this make the next cycle easier? Creates/removes dependencies? Consistent with patterns?
Worktree Isolation
Read reference worktree-isolation for isolation verification and commit protocol.
Turn budget
Target: 15–20 turns. Max: 25 (hard profile cap).
- Batch Edits. Use
MultiEditfor same-file edits. - Read once, edit decisively. Most builds need ≤3 fresh reads.
- Self-Verify ONCE. Run suite once post-implementation. If fail, fix & re-verify ONCE.
- Retries hard-capped at 3.
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.
- yesterday First seen · 280 lines · 34 tokens per session scan A 630ddd7b102d
evolve-builder is an agent published in the GitHub repository mickeyyaya/evolve-loop (5 stars, last pushed yesterday), licensed Apache-2.0. It adds 34 tokens to every session and 5,468 once invoked, about $0.0002 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.
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