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 commands/kastalien-research/thoughtbox/implement-briefgit clone --depth 1 https://github.com/Kastalien-Research/thoughtboxWrote 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/commands/kastalien-research/thoughtbox/implement-brief)<a href="https://agentmods.dev/commands/kastalien-research/thoughtbox/implement-brief"><img src="https://agentmods.dev/badge/commands/kastalien-research/thoughtbox/implement-brief.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 | $0.00006 | $0.00243 |
| Opus 5 | $0.00003 | $0.00121 |
| Sonnet 5 | $0.00001 | $0.00049 |
| Haiku 4.5 | $0.00001 | $0.00024 |
Grade A, and why
hdd-implement-brief 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.
What it actually says
HDD Implement Module
Inputs
task_goalpaths_to_inspectacceptance_checksstaging_adr_path
Steps
- Extract implementation scope from ADR decision and validation plan.
- Implement minimal changes required to exercise hypotheses.
- Add or update tests tied to each hypothesis.
- Track deviations from ADR scope and justify each deviation.
- Prepare implementation artifact list for validation.
Outputs
statussummaryartifactsopen_riskstest_targets
Stop Conditions
- Success: implementation and hypothesis-linked tests are ready.
- Failure: implementation diverges from ADR with no valid rationale.
- Escalation: blocked by external dependency or contradictory requirement.
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 · 42 lines · 6 tokens per session scan A 981d18f8f368
hdd-implement-brief is a command published in the GitHub repository Kastalien-Research/thoughtbox (64 stars, last pushed 1mo ago), licensed MIT. It adds 6 tokens to every session and 243 once invoked, about $0.0000 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 2026-09-03.
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