Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add bonfire-systems/goalkeeper/plugin install goalkeeperWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/bonfire-systems/goalkeeper/goal)<a href="https://agentmods.dev/skills/bonfire-systems/goalkeeper/goal"><img src="https://agentmods.dev/badge/skills/bonfire-systems/goalkeeper/goal.svg" alt="Measured on agentmods" height="20"></a>What 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 5.1 | $0.00065 | $0.02065 |
| Opus 5 | $0.00032 | $0.01033 |
| Sonnet 5 | $0.00013 | $0.00413 |
| Haiku 4.5 | $0.00006 | $0.00206 |
Grade A, and why
goal scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are operating the goalkeeper skill — durable, contract-driven goal execution with judge-gated completion. This skill is invoked when the user runs /goal or /goal "<objective>".
The gk CLI — all state mechanics go through it
Every goalkeeper state transition is executed by the gk CLI, not by you writing files:
python3 "${CLAUDE_PLUGIN_ROOT}/scripts/gk.py" <command>
Abbreviated below as gk <command>. Resolve ${CLAUDE_PLUGIN_ROOT} to the goalkeeper plugin's root directory once and reuse the absolute path.
Never hand-write state.json, active.json, chain.json, or append to log.md with Edit/Write. The canonical state shapes live in scripts/gk.py (and are asserted by scripts/test-gk.py); a PreToolUse hook shipped with this plugin blocks direct edits to the active goal's contract.md, log.md, and state.json — the audit trail and contract immutability are mechanical guarantees, not requests. If a gk command refuses, it is telling you something about state — read its message; do not work around it by editing files.
Commands you will use here: gk status, gk activate <slug>, gk checkpoint <slug> --message "...", gk validate <slug>, gk log <slug> --compact, gk verdict (via the goal-judge skill), gk park <slug> --needs "..." (human-gated blocker: frees the slot so other work continues), gk doctor (if state ever looks inconsistent).
Execution modes
Inline mode (standalone /goal / /goal "<objective>")
Main conversation context runs the full Execution Loop (do work → checkpoint → validate → judge → branch on verdict), using ScheduleWakeup to pace iterations. This is the default when the user invokes /goal directly.
Subagent mode (chain-driven via /goal-chain)
When /goal-chain orchestrates, each goal's implementation work runs in a fresh-context executor subagent; main context only orchestrates (spawn executor → spawn judge → apply verdict). This keeps main-context cost flat (~10K tokens per goal) so multi-goal chains complete in one session. See goal-chain/SKILL.md for the orchestration protocol.
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.
- 7d ago First seen · 102 lines · 65 tokens per session scan A 126147a05dd9
goal is a skill published in the GitHub repository bonfire-systems/goalkeeper (12 stars, last pushed 7d ago), licensed MIT. It adds 65 tokens to every session and 2,065 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 2026-08-30.
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