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-supervisor)<a href="https://agentmods.dev/skills/bonfire-systems/goalkeeper/goal-supervisor"><img src="https://agentmods.dev/badge/skills/bonfire-systems/goalkeeper/goal-supervisor/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/bonfire-systems/goalkeeper/goal-supervisor"><img src="https://agentmods.dev/badge/skills/bonfire-systems/goalkeeper/goal-supervisor.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00107 | $0.01783 |
| Opus 5 | $0.00053 | $0.00892 |
| Sonnet 5 | $0.00021 | $0.00357 |
| Haiku 4.5 | $0.00011 | $0.00178 |
Grade A, and why
goal-supervisor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are operating the goal-supervisor skill — the mission-level layer sitting one above individual goals. Where the judge gates a goal against its DoD, the supervisor gates the mission against its charter and decides what goal to run next.
The gk CLI (python3 "${CLAUDE_PLUGIN_ROOT}/scripts/gk.py", abbreviated gk) owns all mission mechanics: initialization, brief assembly, verdict application, and every write to mission.json / mission-log.md / mission-completed.md (a PreToolUse hook blocks direct edits to those while the mission is live; the user's charter mission.md is never blocked). Your job: spawn the supervisor subagent and relay its verdict faithfully.
Mental model
Mission ← .claude/mission.md (user-authored charter)
├─ Goal A (done, in _archive) ← goalkeeper contract — within-goal loop works
├─ Goal B (done, in _archive) ← drafted in response to A's output
└─ Goal … (drafted on demand by supervisor) ← what /goal-supervisor produces
The supervisor is NOT a chain. Chains commit to a linear sequence at chain-start. The supervisor decides direction adaptively based on what the prior goal actually produced.
When to invoke
- After a standalone goal completes (
gk statusreports "No active goal"). - When a multi-goal mission is in flight and you want the next goal to be informed by the prior one.
- NEVER while a goal is in flight — gk refuses (active, paused, and needs_human all count as in-flight).
Mission charter (mission.md) — expected shape
The charter is user-authored — the skill never auto-drafts missions. Sections (none syntactically required, all strongly recommended):
# Mission: <name>
## Objective
<one-paragraph statement of the mission's high-level intent>
## Success condition
<concrete, observable condition for "mission done." Like a goal's definition_of_done
but at the mission level. Specific. Measurable.>
## Constraints
<bulleted list of hard rules. The supervisor will refuse to propose goals
that violate these.>
## Legal next-goal shapes
<bulleted catalog of the kinds of goals this mission may need. The supervisor
draws from this list when proposing next-objectives. Each entry: name +
1-sentence description.>
## Done is not
<bulleted list of things that look like progress but don't satisfy the
success condition — equivalent to a contract's non_goals at the mission level.>
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.
- 9d ago First seen · 120 lines · 107 tokens per session scan A d489f1046600
goal-supervisor is a skill published in the GitHub repository bonfire-systems/goalkeeper (12 stars, last pushed 8d ago), licensed MIT. It adds 107 tokens to every session and 1,783 once invoked, about $0.0005 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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