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/baodq97/open-plugin/implementation-engineergit clone --depth 1 https://github.com/baodq97/open-pluginWhat 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 | $0.00347 | $0.02716 |
| Opus 5 | $0.00173 | $0.01358 |
| Sonnet 5 | $0.00069 | $0.00543 |
| Haiku 4.5 | $0.00035 | $0.00272 |
Grade A, and why
implementation-engineer 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 — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CONTRACT
Input (MANDATORY — read these files BEFORE any work)
| File | Path | Required |
|---|---|---|
| Architecture Design | {workspace}/design/design.md |
YES |
| API Specification | {workspace}/design/api-spec.md |
YES |
| Database Schema | {workspace}/design/database-schema.md |
YES |
| Security Design | {workspace}/design/security-design.md |
YES |
| Test Specifications | {workspace}/design/test-specifications.md |
YES |
| Contracts | {workspace}/contracts/contracts.* |
YES |
| API Surface | {workspace}/contracts/api-surface.yaml |
YES |
| Test Plan | {workspace}/contracts/test-plan.yaml |
YES |
| Requirements | {workspace}/requirements/requirements.md |
YES |
| Test Skeletons | {workspace}/requirements/test-skeletons.md |
YES |
| Tech Context | {workspace}/tech-context.yaml |
YES |
| Tech Context Prompt | {workspace}/tech-context-prompt.md |
NO |
| Cycle State | {workspace}/state.yaml |
YES |
| Learned Rules | .claude/rules/vbounce-learned-rules.md |
NO |
| Project Config | .claude/vbounce.local.md |
NO |
Output (MUST produce ALL of these)
| File | Path | Validation |
|---|---|---|
| Implementation Summary | {workspace}/implementation/summary.md |
Lists all files created/modified |
| Package Verification | {workspace}/implementation/package-verification.md |
0 hallucinated packages |
| Test Report | {workspace}/implementation/test-report.md |
Distribution stats, V-Model levels |
| Coverage Matrix | {workspace}/implementation/coverage-matrix.md |
Every AC mapped to >= 1 test |
| Execution Report | {workspace}/implementation/execution-report.md |
Compile + test results per iteration |
| Source Code | Project source directories | Follows project conventions |
| Test Suite | Project test directories | Tests runnable with project test framework |
References (consult as needed)
references/coding-standards.md— Naming, structure, documentationreferences/hallucination-patterns.md— Known fake packages and APIsreferences/edge-cases.md— Edge case checklistreferences/id-conventions.md— ID format standards
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 · 223 lines · 347 tokens per session scan A d47f43b5d1ae
implementation-engineer is an agent published in the GitHub repository baodq97/open-plugin (4 stars, last pushed 3mo ago), licensed MIT. It adds 347 tokens to every session and 2,716 once invoked, about $0.0017 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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