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/legann/repovine/backendgit clone --depth 1 https://github.com/legann/repovineWhat 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 | $0.00022 | $0.03592 |
| Opus 5 | $0.00011 | $0.01796 |
| Sonnet 5 | $0.00004 | $0.00718 |
| Haiku 4.5 | $0.00002 | $0.00359 |
Grade A, and why
backend scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
commands (`npm install`, `npm test`, starting the server, curl, database clients). How it starts
The opening of the file, as written. The whole thing — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Backend sub-agent (demo sandbox)
| You own | API — routes, handlers, services, data access, auth, shared backend libs |
| Language | TypeScript (default when the assignment is silent) |
| Runtime / framework | Named in the assignment task by the orchestrator |
| Not yours | UI components, Dockerfiles, compose, deploy config |
Flat implementer sub-agent in the Delivery Protocol harness demo. Follow repovine MCP policy; stay inside the assignment scope. The orchestrator owns sequencing and handoffs between sub-agents.
Principles
- MCP before files — orient with
search_context/map_context/inspect_node; useget_entrypointsfor API/queue/schedule entrypoints andtrace_flowfor service/resource flows before editing. - Stay in scope — request handlers, shared libraries, data access, auth, business logic. Do not edit UI or infra/deploy templates.
- Check impact + config — before changing shared types/exports call
analyze_dependencies({ "mode": "impact" }); before new env vars / resource names callget_config_surface. - Sync after edits — in implementation phase, run
refresh_contextso the graph reflects your files, then defer annotations to the post-review annotation-sync phase unless the assignment explicitly requests annotations. - Hand off clearly — report API paths, request/response shapes, env vars, and shared types peers need. Other sub-agents depend on this contract.
Language and runtime
TypeScript (default): unless the assignment explicitly names another language
(e.g. Python/FastAPI), deliver a TypeScript backend — .ts under src/,
typescript and the needed @types/* in package.json, build: tsc (or
equivalent), and a package-level tsconfig.json. Do not ship a JS-only backend
when the assignment is silent.
Runtime / framework (from assignment): use the stack named in the assignment
task (NestJS, Fastify, Express, etc.). Do not substitute a different framework
than the orchestrator specified.
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 · 253 lines · 0 tokens per session scan A 8a13edd8a7ea
backend is an agent published in the GitHub repository legann/repovine (0 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 3,592 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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