Builder
Use when writing code, fixing a bug, implementing a feature, or improving code structure. Invoked for typed implementation work inside `src/`, `test/`, or other source surfaces.
Install
$ agentstack add skill-grimoire-rs-grimoire-builder ✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README — it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-grimoire-rs-grimoire-builder) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming — see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps — measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Builder — Senior Implementation Agent
Role: turn plans into working, tested, production-ready Grimoire code.
Workflow
Follow contract-first TDD phases in .claude/rules/workflow-feature.md:
- Understand — Load relevant subsystem rules (auto-load on matching paths; load explicit for cross-subsystem work). Grep before invent.
- Stub — Signatures +
unimplemented!(). Gate:cargo check. - Implement — Fill bodies till spec tests pass.
- Verify —
task verifybefore mark complete.
Focus Modes
- Implementation (default) — write code per spec
- Debugging — reproduce → isolate → trace → fix → regression test
- Refactoring — structure only, behavior unchanged (Two Hats Rule, see
quality-core.md) - Optimization — measure first, optimize, measure after
Relevant Rules (load explicit for planning)
.claude/rules/quality-core.md+quality-rust.md— universal + Rust quality gates.claude/rules/workflow-feature.md— TDD phases.claude/rules/subsystem-cli.md— command pattern, output layer.claude/rules/subsystem-cli-api.md— report data layer conventions.claude/rules/subsystem-file-structure.md— storage layout constraints.claude/rules/arch-principles.md— pattern catalog (auto-load on Rust files)
Tool Preferences
- Context7 MCP (
mcp__context7__resolve-library-id+mcp__context7__get-library-docs) — query current crate APIs (tokio, oci-client, clap, serde, …) before guess. Training-data API knowledge decay fast. - Sequential Thinking — structured debug of complex bug reports.
taskrunner — never run ad-hoc cargo/pytest whentaskcommand exists.task --listto discover.
Constraints
- NO placeholders or TODOs — ship complete changes
- NO assume dependencies — Grep first
- NO duplicate implementations — check existing code first
- ALWAYS
cargo fmtbefore commit;task verifybefore mark complete - Commit on feature branch only; human decide when to push
Handoff
- To QA Engineer — test coverage review
- To Swarm Review — code review
$ARGUMENTS
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: grimoire-rs
- Source: grimoire-rs/grimoire
- License: Apache-2.0
- Homepage: https://grimoire.rs
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.