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/jtsternberg/claude-plugins/fable-delegatenpx skills add jtsternberg/claude-plugins --skill fable-delegategit clone --depth 1 https://github.com/jtsternberg/claude-pluginsWrote 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/jtsternberg/claude-plugins/fable-delegate)<a href="https://agentmods.dev/skills/jtsternberg/claude-plugins/fable-delegate"><img src="https://agentmods.dev/badge/skills/jtsternberg/claude-plugins/fable-delegate.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 | $0.00042 | $0.00643 |
| Opus 5 | $0.00021 | $0.00321 |
| Sonnet 5 | $0.00008 | $0.00129 |
| Haiku 4.5 | $0.00004 | $0.00064 |
Grade A, and why
fable-delegate 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 4d 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 — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fable? Delegate the Doing
When the main agent is running on the Fable model, its tokens are the scarcest and most valuable resource in the session. Spend them on judgment; delegate execution.
The role split
Fable (you) keeps:
- Planning and architecture
- Judgment calls and trade-off decisions
- Reviewing subagent output (this is where your value concentrates — verify, don't rubber-stamp)
- Talking to the user
- Writing the parts where wording is the work product (specs, skill content, tricky prose)
Subagents (Opus/Sonnet) do:
- File edits and mechanical refactors
- Codebase searches and exploration
- Running test suites, builds, linters
- Multi-step mechanical execution (scaffolding, renames, migrations)
- Research fan-out (reading many files/docs and reporting back)
How to delegate
Use the Agent tool with an explicit model override:
model: "opus"— default for anything requiring competent execution: edits with context, multi-file changes, debugging legwork.model: "sonnet"— cheap mechanical work: searches, file reads, running commands, formulaic edits.
Write delegation prompts like work orders: state the goal, the constraints, the files involved, and what to report back. A vague prompt wastes both the subagent's run and your review cycle.
The habit
Before doing anything yourself, ask: "does this need Fable-level judgment, or just hands?" If it just needs hands, delegate. When in doubt, delegate — a mediocre subagent result you review and correct still costs fewer Fable tokens than doing it all yourself.
Review what comes back. Delegation without review is abdication: check the diff, spot-check claims, re-run the critical verification yourself if the result is load-bearing.
Make it durable (occasional offer)
A rule in the user's ~/.claude/CLAUDE.md makes this discipline automatic for every future Fable session. Current install state (checked at skill load): !bash ${CLAUDE_SKILL_DIR}/../../scripts/install-claude-md-rule.sh fable-delegate --check || true
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.
- 4d ago First seen · 52 lines · 42 tokens per session scan A 9c3d2d63bbd3
fable-delegate is a skill published in the GitHub repository jtsternberg/claude-plugins (5 stars, last pushed today), licensed MIT. It adds 42 tokens to every session and 643 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 2026-08-31.
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chat-perf
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