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 bdfinst/agentic-dev-team --skill handoffgit clone --depth 1 https://github.com/bdfinst/agentic-dev-teamWrote 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/bdfinst/agentic-dev-team/handoff)<a href="https://agentmods.dev/skills/bdfinst/agentic-dev-team/handoff"><img src="https://agentmods.dev/badge/skills/bdfinst/agentic-dev-team/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/bdfinst/agentic-dev-team/handoff"><img src="https://agentmods.dev/badge/skills/bdfinst/agentic-dev-team/handoff.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 | $0.00067 | $0.01619 |
| Opus 5.5 | $0.00027 | $0.00648 |
| Sonnet 5.5 | $0.00013 | $0.00324 |
| Haiku 4.5 | $0.00007 | $0.00162 |
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 17d 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 — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Handoff
One skill, two modes, for getting structured context to another session instead of replaying history:
- Continue mode — compress this task's history so the same task can keep going past the context ceiling, in a fresh window.
- Fork mode — split off a distinguishable, out-of-scope side-task into an independent session (a parallel sibling, or a child that later hands learnings back), without diluting or compacting the current session's context.
Both modes apply the same Three Gates (below) to decide what to keep, compress, and discard — that logic is written once and shared by both modes.
Mode Selection
Keyed off whether a stated purpose exists for an independent/fresh session:
| Signal | Mode |
|---|---|
| No stated purpose — continuing the current task past the ceiling | Continue (default, unchanged behavior) |
| A stated purpose for a distinguishable, out-of-scope side-task | Fork |
| Ambiguous — unclear whether this is the same task or a split-off | Ask: "Continue this task in a fresh window, or split off unrelated work to an independent session?" |
Constraints
- Summaries/handoff artifacts replace conversation history; never reload prior turns
- Never include credentials, PII, or other sensitive data in written output — see Redaction below
- Output must be sufficient for the receiving session to start without replaying history
The Three Gates
Apply in order to all context older than the last 3-5 turns, in both modes:
1. Forget Gate -- Discard
- Exploratory dead ends and rejected approaches
- Verbose tool outputs where only the conclusion matters
- Superseded decisions
- Debugging steps for resolved issues
2. Input Gate -- Preserve
- Current task definition and acceptance criteria
- Active architectural decisions and rationale
- Unresolved questions or blockers
- File paths and line numbers being worked on
- User preferences and feedback from this session
3. Output Gate -- Keep Verbatim
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.
- 17d ago Changed · +1 lines b18b6009db57
- 1mo ago First seen · 139 lines · 67 tokens per session scan A c1721362a4ec
handoff is a skill published in the GitHub repository bdfinst/agentic-dev-team (295 stars, last pushed 4d ago), licensed MIT. It adds 67 tokens to every session and 1,619 once invoked, about $0.0003 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 2026-09-03.
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