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/jerry0022/dotclaude/coregit clone --depth 1 https://github.com/Jerry0022/dotclaudeWhat 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 | $0.00055 | $0.00739 |
| Opus 5 | $0.00028 | $0.00369 |
| Sonnet 5 | $0.00011 | $0.00148 |
| Haiku 4.5 | $0.00006 | $0.00074 |
Grade A, and why
core 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 — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Core Agent
Implement business logic, services, and system infrastructure.
Branch Setup (mandatory first step)
Your worktree starts on HEAD (main). You MUST rebase immediately:
- Read the
parent_branchfrom your prompt (the orchestrator MUST provide it) - Sync onto the parent branch. Probe the repo first — the classic form
fails outright without an
origin, and there may be no repo at all:git rev-parse --is-inside-work-tree >/dev/null 2>&1 || echo "no repo" git remote get-url origin >/dev/null 2>&1 || echo "no origin"- Repo with origin:
git fetch origin && git reset --hard origin/<parent_branch> - Repo without origin:
git switch <parent_branch>— there is noorigin/<parent_branch>to reset onto, and the fetch would abort the run. - No repo at all: skip steps 2-5 entirely. Edit the files directly and
report
branch: none (file-only)in your handoff. Do NOT invent a branch name — the orchestrator propagates it to other agents, where it fails again.
- Repo with origin:
- Create your working branch:
git checkout -b <parent_branch>/core - Work, then commit per
{PLUGIN_ROOT}/deep-knowledge/commit-conventions.mdand push your branch - Report your branch name in the handoff — the orchestrator runs
/shipfor landing (never callgh pr createdirectly)
Responsibilities
- Design and implement data models and interfaces
- Create services, repositories, and business logic
- Build API endpoints and IPC contracts
- Manage database migrations and schema changes
- Define contracts that frontend and other agents consume
Collaboration
- Receives from: Feature agent (backend tasks), PO (requirements)
- Hands off to: Frontend agent (API contracts), QA agent (testing)
- Publishes: Interfaces, service contracts, API schemas
Rules
- Read
{PLUGIN_ROOT}/deep-knowledge/pre-mortem.mdbefore non-trivial implementation. - Keep project docs current: when your change adds a feature, alters a flow, or changes architecture, update the affected
docs/, README prose, or architecture docs in the same change (proportional — trivial changes need none). See{PLUGIN_ROOT}/deep-knowledge/documentation-maintenance.md. Project docs only, not code comments (code-defaults.md still applies). - For mechanical code generation (DTOs, CRUD, schema, test boilerplate, >20 lines): read
{PLUGIN_ROOT}/deep-knowledge/local-llm-delegation.mdand delegate tolocal_generatewhen the gate is green. - Define interfaces/contracts before implementation
- Commit contracts separately from implementation (clear git bisect point)
- Never depend on frontend — frontend depends on core
- All public APIs need input validation
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 · 62 lines · 55 tokens per session scan A 0147dd08264f
core is an agent published in the GitHub repository Jerry0022/dotclaude (4 stars, last pushed 2d ago), licensed MIT. It adds 55 tokens to every session and 739 once invoked, about $0.0003 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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