A command for deleting the latest session in a ContextFun workstream, or a session identified by its ID. A session is a stored unit of work within that named line of work.

Use it to delete the latest session in a workstream or delete one exact session by ID.

It removes an unwanted stored session when the latest one or a specific session should no longer remain.

ctx delete — Skill for Claude Code and Codex by dchu917/ctx

Install

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.

Any agent

npx skills add dchu917/ctx --skill ctx-delete

Clone the repo

git clone --depth 1 https://github.com/dchu917/ctx

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/dchu917/ctx/ctx-delete/github.svg)](https://agentmods.dev/skills/dchu917/ctx/ctx-delete)

Your own site

<a href="https://agentmods.dev/skills/dchu917/ctx/ctx-delete"><img src="https://agentmods.dev/badge/skills/dchu917/ctx/ctx-delete/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/dchu917/ctx/ctx-delete"><img src="https://agentmods.dev/badge/skills/dchu917/ctx/ctx-delete.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 123 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00021	$0.00123
Opus 5.5	$0.00008	$0.00049
Sonnet 5.5	$0.00004	$0.00025
Haiku 4.5	$0.00002	$0.00012

Measured 2mo ago against content hash 1fca9e966b61, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ctx delete 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/ctx_delete.sh, scripts/skills/ctx_delete.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/claude/ctx-delete/SKILL.md · 18 lines

What it actually says

Usage

In chat:
- /ctx delete <workstream> — deletes the latest session in that workstream
- /ctx delete --session-id <id> — deletes that specific session

What it runs

bash ./scripts/ctx_delete.sh
Falls back to ctx delete or python3 scripts/ctx_cmd.py delete

Notes

This is destructive.
Workstream deletion targets the latest session in the named workstream.

Files

What ships with it

2 files 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.

Changes

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.

2mo ago First seen · 18 lines · 21 tokens per session scan A 1fca9e966b61

Subscribe to this mod's changes

ctx delete is a skill published in the GitHub repository dchu917/ctx (127 stars, last pushed 6mo ago), licensed MIT. It adds 21 tokens to every session and 123 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 2026-08-30.

Claude Code Memory and context cli codex context-management developer-tools sqlite

ctx delete next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ctx deletedchu917/ctx	Skill	127	6mo ago	MIT	A	21	Claude Code, Codex
brainctlTSchonleber/brainctl	Skill	78	10d ago	MIT	A	45	Claude Code, Codex
kn-initknowns-dev/knowns	Skill	251	1mo ago	MIT	A	23	Claude Code, Codex
kn-extractknowns-dev/knowns	Skill	251	1mo ago	MIT	A	18	Claude Code, Codex
alive:savealivecontext/alive	Skill	132	1mo ago	MIT	A	78	Claude Code
alive:capture-contextalivecontext/alive	Skill	132	1mo ago	MIT	A	74	Claude Code
alive:load-contextalivecontext/alive	Skill	132	1mo ago	MIT	A	81	Claude Code