Borrowing it
Nothing to install: this file belongs to martin-francois/symphony-trello. 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/martin-francois/symphony-trello/main/.codex/skills/trello-handoff/SKILL.mdgit clone --depth 1 https://github.com/martin-francois/symphony-trelloWrote 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/martin-francois/symphony-trello/trello-handoff)<a href="https://agentmods.dev/skills/martin-francois/symphony-trello/trello-handoff"><img src="https://agentmods.dev/badge/skills/martin-francois/symphony-trello/trello-handoff/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/martin-francois/symphony-trello/trello-handoff"><img src="https://agentmods.dev/badge/skills/martin-francois/symphony-trello/trello-handoff.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 | $0.00041 | $0.02072 |
| Opus 5 | $0.00020 | $0.01036 |
| Sonnet 5 | $0.00008 | $0.00414 |
| Haiku 4.5 | $0.00004 | $0.00207 |
Grade A, and why
trello-handoff 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 11d 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 — 218 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Trello Handoff
Goals
- Move only the current card through configured board lists.
- Leave clear Trello comments for humans.
- Keep active lists free of blocked or completed work.
- Use the workpad for detailed state and a short comment for the visible handoff.
Current-Card Tools
Use these scoped tools when they are advertised:
trello_move_current_cardtrello_add_commenttrello_upsert_workpadtrello_update_blocker_recheck_status
The move tool uses Trello's term list_name for a board list name.
Pickup
When a card starts in Ready for Codex and an In Progress list is
configured, Symphony normally moves it to In Progress before Codex starts.
If Codex still needs to request the pickup move, apply the stale-blocker check
below first and publish any required checking status before that tool call:
{
"tool": "trello_move_current_card",
"arguments": {
"list_name": "In Progress"
}
}
If no in-progress list is configured, leave the card in its active list and continue work.
Stale Blocker Recheck
This section applies only when trello_update_blocker_recheck_status is
advertised. When it is unavailable, do not attempt a managed recheck write;
follow the workflow's tool-disabled final-response or manual handoff path.
The rendered prompt contains only recent Trello comments, so do not use it to
decide whether a stale blocker exists. When the tool is advertised, always call
it with status checking before changing code. The tool inspects the deep
current-card comment window and classifies the newest ordinary comment after
ignoring the ## Codex Workpad and Symphony-managed prerequisite comments. A
Symphony-managed recheck status ends with the exact
Managed by Symphony footer and a link to the qualifying blocker comment on
the current card. Similar visible text, or a link to another card, remains an
ordinary comment. Do not scan past a newer ordinary human comment to find an
older blocker.
The newest ordinary comment qualifies only when its first non-blank line starts
with Blocked: or Blocked by ..., matched without case sensitivity. A human
discussion that merely contains the word blocked does not qualify.
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.
- 11d ago First seen · 218 lines · 41 tokens per session scan A 263c14ebcaaa
trello-handoff is a skill published in the GitHub repository martin-francois/symphony-trello (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 41 tokens to every session and 2,072 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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