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 agentmods add skills/theelgreco/codex-fork-tab/fork-tabnpx skills add theelgreco/codex-fork-tab --skill fork-tabgit clone --depth 1 https://github.com/theelgreco/codex-fork-tabWrote 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/theelgreco/codex-fork-tab/fork-tab)<a href="https://agentmods.dev/skills/theelgreco/codex-fork-tab/fork-tab"><img src="https://agentmods.dev/badge/skills/theelgreco/codex-fork-tab/fork-tab.svg" alt="Measured on agentmods" 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 | $0.00071 | $0.00220 |
| Opus 5 | $0.00036 | $0.00110 |
| Sonnet 5 | $0.00014 | $0.00044 |
| Haiku 4.5 | $0.00007 | $0.00022 |
Grade A, and why
fork-tab 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 4d 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
Fork the active chat into a new tab
Run codex-fork-tab in the current working directory. The command reads the active thread ID from the CODEX_THREAD_ID environment variable injected into Codex shell commands.
Do not ask the user to copy a thread ID. Do not run codex fork in the current terminal: the helper routes the fork to the terminal application and preserves the source chat.
If the command succeeds, tell the user the fork is open. If it reports that the command is missing, direct the user to install codex-fork-tab. If it reports that the terminal or VS Code bridge is unavailable, preserve the exact remediation from the command output.
What ships with it
1 file 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.
- 4d ago First seen · 13 lines · 71 tokens per session scan A 041963ea2ad8
fork-tab is a skill published in the GitHub repository theelgreco/codex-fork-tab (2 stars, last pushed 14d ago), licensed MIT. It adds 71 tokens to every session and 220 once invoked, about $0.0004 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 2026-08-31.
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