Borrowing it
Nothing to install: this file belongs to ymm-oss/fsl. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ymm-oss/fsl/main/.agents/skills/task-start/SKILL.mdgit clone --depth 1 https://github.com/ymm-oss/fslWrote 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/ymm-oss/fsl/task-start)<a href="https://agentmods.dev/skills/ymm-oss/fsl/task-start"><img src="https://agentmods.dev/badge/skills/ymm-oss/fsl/task-start/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/ymm-oss/fsl/task-start"><img src="https://agentmods.dev/badge/skills/ymm-oss/fsl/task-start.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 | $0.00025 | $0.00265 |
| Opus 5.5 | $0.00010 | $0.00106 |
| Sonnet 5.5 | $0.00005 | $0.00053 |
| Haiku 4.5 | $0.00003 | $0.00026 |
Grade A, and why
task-start 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 2mo 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.
What it actually says
Start an FSL task
Use this skill before substantial implementation, debugging, review, or design work.
- Inspect the current branch and
git status --short. - Restate the requested outcome as an observable goal and list explicit non-goals.
- Identify the authority surface: relevant contracts, design documents, tests, native Rust paths, and user constraints.
- Inspect only the narrow evidence needed to establish the current state. Delegate broad, read-heavy exploration to
evidence_explorerwhen it reduces the main context. - Create or replace
tasks/active.mdfromtasks/active.template.md. - Record invariants, evidence, scope, sibling paths, verification commands, remaining uncertainty, the discovered-follow-up ledger, and one concrete next action. For migration or parity work, inventory behavior-bearing AST/enum variants; top-level corpus counts are not semantic completeness.
- Remove stale or speculative content from a previous task.
- Stop before implementation so the task packet can be checked independently.
Keep the packet concise. Do not paste raw logs, full search results, secrets, or machine-specific absolute paths.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2mo ago First seen · 22 lines · 25 tokens per session scan A eda8878bbbda
task-start is a skill published in the GitHub repository ymm-oss/fsl (35 stars, last pushed today), licensed Apache-2.0. It adds 25 tokens to every session and 265 once invoked, about $0.0001 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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