bb is an agentic IDE that lets users control, customize, and automate a software-development environment through a desktop app, web app, command-line interface, or HTTP API. Developers use it to run work in observable threads that can be steered or handed off to other agents. Its catalogue add-ons provide skills and instructions for working with bb.
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 get-bb/bb --skill agent-annotationsgit clone --depth 1 https://github.com/get-bb/bbWrote 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/get-bb/bb/agent-annotations)<a href="https://agentmods.dev/skills/get-bb/bb/agent-annotations"><img src="https://agentmods.dev/badge/skills/get-bb/bb/agent-annotations/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/get-bb/bb/agent-annotations"><img src="https://agentmods.dev/badge/skills/get-bb/bb/agent-annotations.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 | $0.00024 | $0.00323 |
| Opus 5.5 | $0.00010 | $0.00129 |
| Sonnet 5.5 | $0.00005 | $0.00065 |
| Haiku 4.5 | $0.00002 | $0.00032 |
Grade A, and why
agent-annotations 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 29d 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.
What it actually says
Enable Agent Annotations in Settings → Plugins. In a desktop Browser tab, activate Annotate elements, select an element, and add its comment to the prompt. Click a numbered pin to edit its comment, including when selection mode is off. Save or Ctrl+Enter (Command+Enter on macOS) updates the saved comment; Cancel or Escape discards the edit. Blank comments cannot be saved. Delete in the pin editor removes that pin and its reference from the current unsent prompt. Successful local message submission or queueing clears the page annotations; failed sends keep them. Pins also disappear when the page navigates or reloads. Saved records remain available to previously sent messages.
Prompt mentions use a stable annotation number and element description. Edits update the context resolved when the prompt is sent without inserting another mention. Messages already sent are unchanged.
The plugin exposes update through its typed agentAnnotationsRpcContract and the generic plugin RPC SDK/CLI. Supply the saved annotation ID and a nonblank comment of up to 4000 characters in a JSON file:
{ "id": "annotation-id", "comment": "Make this button green" }
bb plugin rpc call agent-annotations update --input-file annotation-update.json --json
An unknown ID or invalid comment fails without creating a record. RPC updates change saved context; an already-open page pin keeps its local comment until it is edited again.
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.
- 29d ago First seen · 21 lines · 24 tokens per session scan A 459c0cd08334
agent-annotations is a skill published in the GitHub repository get-bb/bb (4,324 stars, last pushed today), licensed MIT. It adds 24 tokens to every session and 323 once invoked, about $0.0001 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 2026-09-17.
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