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 skills add FlyFission/nuclear-grade-context-engineering --skill staying-on-missiongit clone --depth 1 https://github.com/FlyFission/nuclear-grade-context-engineeringWrote 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/flyfission/nuclear-grade-context-engineering/staying-on-mission)<a href="https://agentmods.dev/skills/flyfission/nuclear-grade-context-engineering/staying-on-mission"><img src="https://agentmods.dev/badge/skills/flyfission/nuclear-grade-context-engineering/staying-on-mission/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/flyfission/nuclear-grade-context-engineering/staying-on-mission"><img src="https://agentmods.dev/badge/skills/flyfission/nuclear-grade-context-engineering/staying-on-mission.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00090 | $0.02153 |
| Opus 5.5 | $0.00036 | $0.00861 |
| Sonnet 5.5 | $0.00018 | $0.00431 |
| Haiku 4.5 | $0.00009 | $0.00215 |
Grade A, and why
staying-on-mission 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 1mo 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 — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Staying on Mission
Overview
Mission drift is when an agent keeps shipping work that no longer serves the original goal. It comes in two forms. The first is intent drift: scope creeps, the goal quietly gets swapped for a smaller one, or the agent wins the task but loses the mission. The second is standards drift: the work gets a little less careful each time you accept one more small exception. Letting a bad habit become normal this way is called the normalization of deviance.
This skill keeps a written mission anchor in front of the work. When an action stops serving that anchor, you make one of three choices: re-anchor, escalate, or stop. The anchor has three parts: the goal, the success criteria (how you know you are done), and the clear non-goals (what you are deliberately not doing). One named person owns the anchor. That person is responsible for whether this change still serves its mission. Every small action still has to trace back to that larger mission.
The anchor is also the clarity that lets authority move to the edge: it is the commander's intent that keeps a decentralized decision aligned with the goal. Push decisions to where the information is, but only against a clear, shared anchor — otherwise local wins quietly drift from the mission.
Decision contract
- Claim checked: the current action was tested against the written anchor's goal, success criteria, and non-goals, the loop and attempt count were actually run, and any crossed non-goal or loosened standard has a justification row, not a quiet edit.
- Artifact observed: the written anchor (
.nuclear/mission.md,## Mission anchorinrisk.md, or.nuclear/charter.md) and the current action/diff -> a recorded continue/re-anchor/escalate/stop decision, updated anchor, and any justification row. - Decision affected: block -- continue / re-anchor / escalate / stop, plus the restated goal anchor.
- Failure class: mission-drift (an action serving a swapped-in goal, a crossed non-goal, or a standard loosened "just this once").
- Next action: stop and return to the anchor when a non-goal would be crossed with no justification; 3 failed attempts or scope you cannot check escalates to the owner.
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.
- 1mo ago First seen · 131 lines · 90 tokens per session scan A 5aab0b535ebe
staying-on-mission is a skill published in the GitHub repository FlyFission/nuclear-grade-context-engineering (33 stars, last pushed 3d ago), licensed MIT. It adds 90 tokens to every session and 2,153 once invoked, about $0.0004 per session on Opus 5.5. 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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