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/stratalab/strata-coreWrote 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/stratalab/strata-core/branch.fork_at_version)<a href="https://agentmods.dev/commands/stratalab/strata-core/branch.fork_at_version"><img src="https://agentmods.dev/badge/commands/stratalab/strata-core/branch.fork_at_version/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/stratalab/strata-core/branch.fork_at_version"><img src="https://agentmods.dev/badge/commands/stratalab/strata-core/branch.fork_at_version.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 | $0.00000 | $0.00166 |
| Opus 5.5 | $0.00000 | $0.00066 |
| Sonnet 5.5 | $0.00000 | $0.00033 |
| Haiku 4.5 | $0.00000 | $0.00017 |
Grade A, and why
branch.fork_at_version 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 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.
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
Forks a new branch anchored at a retained commit version of the source branch, giving time-travel semantics: the new branch sees exactly the data visible at that version. A version outside retained history fails with history_unavailable.engine.persistence_history.
This command has no dedicated CLI verb: the CLI expresses it as strata branch fork <SOURCE> <BRANCH> --version <VERSION> (one shared branch fork verb routes to all three fork commands, so only branch.fork owns the CLI path). It remains fully reachable through the generic wire surface — strata command run, MCP, and SDKs.
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 · 9 lines · 0 tokens per session scan A af3ca1209d36
branch.fork_at_version is a command published in the GitHub repository stratalab/strata-core (3 stars, last pushed 17d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 166 tokens. 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 2026-08-31.
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repo-audit
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pr
Handle the full workflow from current branch state to an open, CI-monitored pull request.
codex-review
Use when asked to check, turn on, turn off, or switch this repo's Codex review mode (local, github, or off), or to report the effective mode and Codex sandbox status.