Borrowing it
Nothing to install: this file belongs to dchu917/ctx. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/dchu917/ctx/main/.cursor/commands/ctx-start.mdgit clone --depth 1 https://github.com/dchu917/ctxWrote 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/dchu917/ctx/ctx-start)<a href="https://agentmods.dev/commands/dchu917/ctx/ctx-start"><img src="https://agentmods.dev/badge/commands/dchu917/ctx/ctx-start/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/dchu917/ctx/ctx-start"><img src="https://agentmods.dev/badge/commands/dchu917/ctx/ctx-start.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 | $0.00181 |
| Opus 5.5 | $0.00000 | $0.00072 |
| Sonnet 5.5 | $0.00000 | $0.00036 |
| Haiku 4.5 | $0.00000 | $0.00018 |
Grade A, and why
ctx-start 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
Experimental integration for creating a new ctx workstream in Cursor.
Treat any extra text after /ctx-start as the argument string for ctx start.
Run:
ctx start <arguments>
If ctx is unavailable, fall back to:
python3 scripts/ctx_cmd.py start <arguments> --format markdown
Behavior notes:
startcreates a new workstream and its first session.- If the requested workstream name already exists, ctx auto-creates a suffixed name such as
name (1). - Treat
--pullstrictly as a flag, never as part of the workstream name. - After the command returns, summarize the loaded workstream briefly, mention the latest relevant activity, and ask how the user wants to proceed.
- Do not paste the full ctx pack back unless the user explicitly asks for it.
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 · 24 lines · 0 tokens per session scan A 5bfb731152d8
ctx-start is a command published in the GitHub repository dchu917/ctx (127 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 181 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 2026-08-30.
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