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 skills/openagentsinc/openagents/fast-follownpx skills add OpenAgentsInc/openagents --skill fast-followgit clone --depth 1 https://github.com/OpenAgentsInc/openagentsWrote 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/openagentsinc/openagents/fast-follow)<a href="https://agentmods.dev/skills/openagentsinc/openagents/fast-follow"><img src="https://agentmods.dev/badge/skills/openagentsinc/openagents/fast-follow.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 | $0.00034 | $0.01786 |
| Opus 5 | $0.00017 | $0.00893 |
| Sonnet 5 | $0.00007 | $0.00357 |
| Haiku 4.5 | $0.00003 | $0.00179 |
Grade A, and why
fast-follow 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 6d 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 — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fast Follow
Use this skill when a project has a FASTFOLLOW.md, the user asks to fast
follow another project, or Full Auto selects Fast Follow as its work source.
FastFollowSpec declares learning intent. It never grants implementation,
verification, release, spend, deployment, or public-claim authority.
Resolve authority first
- Resolve the nearest applicable
AGENTS.mdandINVARIANTS.md. - Resolve
FASTFOLLOW.mdbeside thatAGENTS.md, or the exact repository-relative path named by it. - Read the FastFollowSpec completely, including every typed block needed by the selected directive.
- Validate the format version, lifecycle, stable IDs, source/lesson refs, target scope, work stage, write boundary, and implementation requirements.
- Read current ProductSpec, AssuranceSpec, roadmap, issue, claim, and receipt authorities relevant to the target scope.
If work_generation.initial_program exists, bind its exact strategy artifact
and select the first directive in directive_order without a durable terminal
or blocked disposition. Use its default_stage. Advance only under its
declared transition and exhaustion policy. Do not silently substitute a
higher-priority catalog directive.
If the spec is missing, malformed, unsupported, escaped, stale, or internally inconsistent, report a typed blocker. Do not reconstruct policy from nearby prose, filenames, teardown advice, or an older run.
Choose exactly one lane
The initiating request or an admitted run policy selects one lane:
research— pin and study source material. Write only configured study, gap, candidate, receipt, or teardown artifacts. Never edit product code.gap_analysis— compare a pinned StudyPacket with an exact target revision and current authority. Produce evidence, not an adoption verdict.candidate_proposal— produce one deduped issue/work-packet proposal with target constraints and proof refs. Do not open or admit it unless separately authorized.implementation— consume one already admitted issue, accepted plan, or work packet after claim/worktree/dependency checks. Implement the smallest target-native adaptation and run target-local proof. Orverification— execute the target's reviewed proof design and report axes without claiming acceptance.
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.
- 6d ago First seen · 187 lines · 34 tokens per session scan A ad126af1c00b
fast-follow is a skill published in the GitHub repository OpenAgentsInc/openagents (446 stars, last pushed today), licensed Apache-2.0. It adds 34 tokens to every session and 1,786 once invoked, about $0.0002 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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