Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add johardi/claude-stack/plugin install cstack-collabWrote 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/johardi/claude-stack/handoff)<a href="https://agentmods.dev/skills/johardi/claude-stack/handoff"><img src="https://agentmods.dev/badge/skills/johardi/claude-stack/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/johardi/claude-stack/handoff"><img src="https://agentmods.dev/badge/skills/johardi/claude-stack/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 | $0.00172 | $0.01001 |
| Opus 5.5 | $0.00069 | $0.00400 |
| Sonnet 5.5 | $0.00034 | $0.00200 |
| Haiku 4.5 | $0.00017 | $0.00100 |
Grade A, and why
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 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 — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Handoff
The agent is standing in an isolated worktree (created by Agent({isolation: "worktree"}) or by cstack-collab orchestration). The human wants to take the branch over locally — review the actual files, run a dev server, etc. — without waiting for a PR merge or the harness's automatic worktree reaping.
This skill is the agent's "I'm yielding" ritual. It does not remove the worktree (the agent is standing in it); it puts the branch in a state where the human can pick it up cleanly via /cstack-collab:reclaim.
When to Use
Use when:
- The human types
/cstack-collab:handoff(with optional flags). - The human says something equivalent during an active agent session: "let's hand off", "I'll take over", "wrap up so I can check out the branch", "finish cleanly".
Skip when:
- Not inside a Claude agent worktree. The script will refuse anyway, but recognize this up front and route the human to
/cstack-collab:reclaiminstead. - The human is asking the agent to commit its work but keep working — that's just a normal commit, not a handoff.
Inputs
The human may pass any of these (interpret natural language too — e.g., "stash my changes" → --stash):
| Flag | Meaning |
|---|---|
--commit "<msg>" |
Commit dirty state on the current branch with this message. Default if you can derive a meaningful message from the conversation. |
--stash |
Preserve dirty state at refs/cstack-collab/handoff/<agent-id> instead of committing. |
--discard |
Throw the dirty state away. |
--no-push |
Skip the git push -u origin <branch> step. Default is to push. |
--summary "<text>" |
One-line summary recorded in state.json events (orchestration only). |
If the tree is dirty and none of --commit, --stash, --discard is supplied, the script refuses. Do not silently pick one for the user — ask them which they want, citing the changed files.
How to Run
python3 "${CLAUDE_PLUGIN_ROOT}/scripts/handoff.py" [flags]
The script:
- Refuses if not inside a Claude agent worktree.
- Handles dirty state per the flag (commit / stash / discard).
- Best-effort
git push -u origin <branch>(override with--no-push). - Appends a
handoffevent tostate.jsonif an orchestration is active. - Prints the exact
/cstack-collab:reclaiminvocation the human should run from their primary repo.
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 · 65 lines · 172 tokens per session scan A c43a74db948d
handoff is a skill published in the GitHub repository johardi/claude-stack (2 stars, last pushed 5mo ago), licensed MIT. It adds 172 tokens to every session and 1,001 once invoked, about $0.0007 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 2026-08-31.
Other skills, from other repositories
merge-batch
Prepare and merge an owner-selected PR batch with contributor credit and exact-candidate admission. Use for a pasted PR list; combined focused validation is diagnostic, and every actual landing still requires its applicable checks and authorization.
prowler-commit
Creates professional git commits following conventional-commits format. Trigger: When creating commits, after completing code changes, when user asks to commit.
gh-auth-isolation
Safely manage multiple GitHub identities (EMU + personal) in agent workflows.
github-skill
Work with GitHub via the gh CLI — clone repositories, create/list/merge pull requests, create/list issues, and run any other gh command (API calls, workflow runs, releases, repo administration). List operations return parsed JSON.
comet-github
A routing guide for Comet-related GitHub work. It directs requests about pull requests, issues, CI failures, ideas, and fixes to the appropriate review or implementation process.
release-helper
Ensures configuration and code changes are released correctly. Use PROACTIVELY whenever you edit config.json, change any setting, or fix a configuration bug in this project, so the change reaches production.