DART is an open-source C++23 physics engine that simulates the movement and interactions of articulated rigid-body systems for robotics, animation, and machine learning. Researchers and developers use it for kinematics, dynamics, collision handling, constraints, and loading robot models, with C++ and Python interfaces. The catalogue add-ons support workflows built around this engine.
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.
git clone --depth 1 https://github.com/dartsim/dartWrote 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/commands/dartsim/dart/dart-changelog)<a href="https://agentmods.dev/commands/dartsim/dart/dart-changelog"><img src="https://agentmods.dev/badge/commands/dartsim/dart/dart-changelog/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/commands/dartsim/dart/dart-changelog"><img src="https://agentmods.dev/badge/commands/dartsim/dart/dart-changelog.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 | $0.00016 | $0.02026 |
| Opus 5.5 | $0.00006 | $0.00810 |
| Sonnet 5.5 | $0.00003 | $0.00405 |
| Haiku 4.5 | $0.00002 | $0.00203 |
Grade A, and why
dart-changelog 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 — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Maintain DART changelog entries: $ARGUMENTS
Purpose
dart-changelog is the reusable changelog decision and writing routine. It is
usually invoked by other DART workflows when they reach a changelog decision,
not directly by users.
Use it to:
- decide whether a change needs a changelog entry;
- draft an entry at the right level of detail;
- add a PR link after publication;
- audit pending fragments or a release section for missing or over-detailed entries; or
- assemble
main's fragments at a checkpoint.
On main, an entry is a
changelog.d/ fragment and only checkpoint assembly adds entries to
CHANGELOG.md;
release-* branches edit CHANGELOG.md directly. Keep style, placement,
evidence, and release-note density aligned with docs/onboarding/changelog.md.
Required Reading
@AGENTS.md @docs/onboarding/changelog.md @docs/onboarding/release-management.md @changelog.d/README.md
Modes
Interpret $ARGUMENTS as one of these modes when present:
decide: determine whether the current change needs a changelog entry and record the reason in author/task notes when no entry is needed.draft: write or revise the entry before a PR number exists: achangelog.d/<topic>.mdfragment onmain, aCHANGELOG.mdentry on arelease-*branch.finalize: add the PR link line to the fragment (or release-branch entry) or adjust the entry after a PR exists, keeping the follow-up local until explicit maintainer/user approval permits a push.audit: scan pendingchangelog.d/fragments, aCHANGELOG.mdrelease section, or a PR set for missing, duplicate, over-detailed, misplaced, or stale entries.release-audit: alias forauditwhen the caller is finalizing a release section as part of release packaging (seedocs/onboarding/release-management.md).assemble: at a checkpoint (each milestone exit, before a release candidate, tag, or release-branch cut frommain, or when the maintainer asks), runpixi run changelog-assembleon a topic branch from freshorigin/main, thenrelease-auditthe assembled section. Its PR still needs explicit maintainer/user approval before it is opened.
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 Changed · +6 lines 6767b1218075
- 14d ago Changed · +26 lines · +2 tokens per session de25289bdd75
- 23d ago Changed · +1 lines 94798ab75d49
- 28d ago Changed · +3 lines 0017828312b6
- 1mo ago Changed 154549ae9d1e
- 1mo ago Changed · +5 lines b9cf1128b9dc
- 2mo ago Changed 5f940ffc2fe0
- 2mo ago First seen · 140 lines · 14 tokens per session scan A 516bc02c0e5a
dart-changelog is a command published in the GitHub repository dartsim/dart (1,223 stars, last pushed yesterday), licensed BSD-2-Clause. It adds 16 tokens to every session and 2,026 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 2026-09-01.
dart-changelog compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| dart-changelogdartsim/dart | Command | 1.2k | yesterday | BSD-2-Clause | A | 16 | Claude Code |
| landgmickel/flow-next | Command | 717 | yesterday | MIT | A | 13 | Claude Code |
| qualityDesko77/claude-code-skills-1c | Command | 90 | yesterday | MIT | A | 18 | Claude Code |
| release-notesOpenHands/extensions | Command | 176 | yesterday | MIT | A | 44 | Claude Code |
| release-managerruvnet/agentic-flow | Command | 838 | yesterday | none | A | 0 | Claude Code |
| release-planalisunstar/OpenSunstar | Command | 31 | 14d ago | Apache-2.0 | A | 0 | Claude Code |
| doc-changelogchristopherlouet/claude-base | Command | 5 | 6d ago | MIT | A | 0 | Claude Code |