Borrowing it
Nothing to install: this file belongs to s-hiraoku/vscode-sidebar-terminal. 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/s-hiraoku/vscode-sidebar-terminal/main/.agents/skills/synapse-a2a/SKILL.mdgit clone --depth 1 https://github.com/s-hiraoku/vscode-sidebar-terminalWrote 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/s-hiraoku/vscode-sidebar-terminal/synapse-a2a)<a href="https://agentmods.dev/skills/s-hiraoku/vscode-sidebar-terminal/synapse-a2a"><img src="https://agentmods.dev/badge/skills/s-hiraoku/vscode-sidebar-terminal/synapse-a2a/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/s-hiraoku/vscode-sidebar-terminal/synapse-a2a"><img src="https://agentmods.dev/badge/skills/s-hiraoku/vscode-sidebar-terminal/synapse-a2a.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 154 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00102 | $0.03611 |
| Opus 5 | $0.00051 | $0.01806 |
| Sonnet 5 | $0.00020 | $0.00722 |
| Haiku 4.5 | $0.00010 | $0.00361 |
Grade A, and why
synapse-a2a 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 — 259 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Synapse A2A Communication
Inter-agent communication framework via Google A2A Protocol.
Quick Reference
| Task | Command |
|---|---|
| List agents | synapse list (auto-refresh, interactive: arrows/1-9 select, Enter jump, k kill, / filter; --json for machine-readable output). MCP alternative: list_agents tool (via tools/call) |
| Agent detail | synapse status <target> [--json] |
| Send message | synapse send <target> "<msg>" (default: --notify; --from auto-detected) |
| Send with task | synapse send <target> "<msg>" --task / -T (auto-creates board task, auto-claim on receive, auto-complete on finalize) |
| Broadcast | synapse broadcast "<msg>" |
| Wait for reply | synapse send <target> "<msg>" --wait |
| Fire-and-forget | synapse send <target> "<msg>" --silent |
| Reply | synapse reply "<response>" |
| Reply to specific | synapse reply "<response>" --to <sender_id> |
| Interrupt (priority 4) | synapse interrupt <target> "<msg>" |
| Spawn agent | synapse spawn <type> --name <n> --role "<r>" -- <tool-specific-automation-args> |
| Spawn with worktree | synapse spawn <type> --worktree --name <n> --role "<r>" -- <tool-specific-automation-args> |
| Team start | synapse team start <homogeneous-profiles...> [--worktree] -- <tool-specific-automation-args> |
| Create task | synapse tasks create "<subject>" -d "<desc>" --priority <n> [--group G] [--component C] [--milestone M] |
| List tasks | synapse tasks list [--verbose] [--format json] [--group-by COL] [--group G] [--component C] [--milestone M] |
| Assign task | synapse tasks assign <id> <agent> |
| Complete task | synapse tasks complete <id> |
| Purge tasks | synapse tasks purge [--status STATUS] [--older-than DURATION] [--dry-run] |
| Approve plan | synapse approve <id> |
| Reject plan | synapse reject <id> --reason "<feedback>" |
| Save knowledge | synapse memory save <key> "<content>" --tags <t> --notify |
| Search knowledge | synapse memory search "<query>" |
| Lock file | synapse file-safety lock <file> <agent_id> --intent "..." |
| Check locks | synapse file-safety locks |
| Task history | synapse history list --agent <name> |
| Kill agent | synapse kill <name> -f |
| Attach files | synapse send <target> "<msg>" --attach <file> --wait |
| Saved agents | synapse agents list / synapse spawn <agent_id> |
| Post to Canvas | synapse canvas post <format> "<body>" --title "<title>" |
| Link preview | synapse canvas link "<url>" --title "<title>" |
| Post template | synapse canvas briefing '<json>' --title "<title>" |
| Post plan card | synapse canvas plan '<json>' --title "<title>" (Mermaid DAG + step list with status tracking) |
| Open Canvas | synapse canvas open (auto-starts server, opens browser) |
| Accept plan | synapse tasks accept-plan <plan_id> (register plan steps as task board tasks) |
| Sync plan progress | synapse tasks sync-plan <plan_id> (sync task board status back to plan card) |
What ships with it
8 files 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.
- 11d ago First seen · 259 lines · 102 tokens per session scan A 41cde7d2d1ab
synapse-a2a is a skill published in the GitHub repository s-hiraoku/vscode-sidebar-terminal (21 stars, last pushed yesterday), licensed MIT. It adds 102 tokens to every session and 3,611 once invoked, about $0.0005 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 2026-09-01.
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