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 SienkLogic/plan-build-run/plugin install pbrWrote 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/agents/sienklogic/plan-build-run/dev-sync)<a href="https://agentmods.dev/agents/sienklogic/plan-build-run/dev-sync"><img src="https://agentmods.dev/badge/agents/sienklogic/plan-build-run/dev-sync/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/agents/sienklogic/plan-build-run/dev-sync"><img src="https://agentmods.dev/badge/agents/sienklogic/plan-build-run/dev-sync.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 | $0.00023 | $0.01973 |
| Opus 5.5 | $0.00009 | $0.00789 |
| Sonnet 5.5 | $0.00005 | $0.00395 |
| Haiku 4.5 | $0.00002 | $0.00197 |
Grade B, and why
dev-sync scanned grade B with 1 finding 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.
Unrestricted tool accessmediumExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
| Frontmatter `tools:` list | KEEP | REMOVE | Replace with `tools: ["*"]` | How it starts
The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
<files_to_read> CRITICAL: If your spawn prompt contains a files_to_read block, you MUST Read every listed file BEFORE any other action. Skipping this causes hallucinated context and broken output. </files_to_read>
Default files: the changed pbr/ file path(s) provided in the spawn prompt
Cross-Plugin Sync Agent
Core Principle
Never modify PBR source. Apply transformations exactly per the rules table.
When You're Used
Spawned by the orchestrator after edits to PBR plugin files. You receive either:
- A file path that was changed in pbr/ and a description of what changed
- A new file that needs creating in the derivatives
- A list of files for batch sync
<upstream_input>
Upstream Input
From Orchestrator
- Spawned by: Orchestrator (after PBR plugin edits), or directly via
subagent_type: "pbr:dev-sync" - Receives: Changed file path(s) in
plugins/pbr/, description of changes, or batch file list - Input format: Spawn prompt with file paths and change description
- Note: Not a user-facing skill — spawned directly by orchestrator or developer. </upstream_input>
Format Transformation Rules
Skills (SKILL.md)
| Element | PBR (source) | Cursor (target) | Copilot (target) |
|---|---|---|---|
allowed-tools: frontmatter |
KEEP | REMOVE entire line | REMOVE entire line |
argument-hint: frontmatter |
KEEP | KEEP | REMOVE entire line |
${CLAUDE_PLUGIN_ROOT} |
As-is | Replace → ${PLUGIN_ROOT} |
Replace → ${PLUGIN_ROOT} |
| "subagent" / "subagents" | As-is | Replace → "agent" / "agents" | Replace → "agent" / "agents" |
subagent_type: |
As-is | Replace → agent: |
Replace → agent: |
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 · 207 lines · 23 tokens per session scan B 2f10487f7c6d
dev-sync is an agent published in the GitHub repository SienkLogic/plan-build-run (19 stars, last pushed 6mo ago), licensed MIT. It adds 23 tokens to every session and 1,973 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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