capture

capture is a command for coding agents from MadAppGang/magus. It costs 29 tokens per session (688 once invoked), scanned A, original, MIT.

A command for quickly adding a task to a Getting Things Done (GTD) inbox, with options for a someday list and context tags.

In plain words
What is it for?
Use it to capture tasks such as investigating a technical issue, optionally marking them for later or tagging them by context.
Why use it?
It gives you one quick place to record work before deciding how to organise or schedule it.

Command

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the gtd plugin — 2 skills, 5 commands, 1 agent shipped together

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.

agentmods
npx agentmods add commands/madappgang/magus/capture
Clone the repo
git clone --depth 1 https://github.com/MadAppGang/magus

Or install gtd, the plugin that ships this one along with the rest of its 2 skills, 5 commands, 1 agent.

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.

agentmods badge for capture

README.md
[![agentmods](https://agentmods.dev/badge/commands/madappgang/magus/capture.svg)](https://agentmods.dev/commands/madappgang/magus/capture)
Your own site
<a href="https://agentmods.dev/commands/madappgang/magus/capture"><img src="https://agentmods.dev/badge/commands/madappgang/magus/capture.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 688 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00029 $0.00688
Opus 5 $0.00015 $0.00344
Sonnet 5 $0.00006 $0.00138
Haiku 4.5 $0.00003 $0.00069

Measured yesterday against content hash e4578d759b18, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

capture 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 yesterday.

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.

plugins/gtd/commands/capture.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GTD Capture

You are implementing the GTD capture command. The user wants to add an item to their GTD inbox immediately.

Parse the Input

The user invoked /gtd:capture with optional text arguments. Extract:

  • text: The main capture text (everything after /gtd:capture, removing quotes and flags)
  • --someday: Flag to capture directly to Someday/Maybe list instead of inbox
  • --context @tag: Optional context tag (e.g., @code, @review, @research)

If no text was provided, ask: "What do you want to capture? (e.g., /gtd:capture \"Investigate Redis clustering\")"

Execute

Run this Bash command to add the item to GTD:

# Set variables from parsed input
TEXT="<captured text>"
LIST="inbox"  # or "someday" if --someday flag present
CONTEXT_TAG=""  # e.g. "@code" if --context provided

CWD=$(pwd)
GTD_FILE="${CWD}/.claude/gtd/tasks.json"
GTD_LIB="${CLAUDE_PLUGIN_ROOT}/hooks/gtd-lib.sh"

# Ensure GTD store exists
bash -c "source \"${GTD_LIB}\" && CWD=\"${CWD}\" gtd_init"

# Generate ID and append task
ID=$(bash -c "source \"${GTD_LIB}\" && CWD=\"${CWD}\" gtd_new_id")
NOW=$(date -u +"%Y-%m-%dT%H:%M:%SZ")

TASK=$(jq -n \
  --arg id "$ID" \
  --arg subject "$TEXT" \
  --arg list "$LIST" \
  --arg created "$NOW" \
  --arg context "$CONTEXT_TAG" \
  '{
    id: $id,
    subject: $subject,
    list: $list,
    context: (if $context != "" then [$context] else [] end),
    parentId: null,
    energy: null,
    timeEstimate: null,
    waitingOn: null,
    dueDate: null,
    created: $created,
    modified: $created,
    completed: null,
    notes: ""
  }')

# Atomic append
TMP="${GTD_FILE}.tmp.$$"
jq --argjson task "$TASK" '.tasks += [$task]' "$GTD_FILE" > "$TMP" && mv "$TMP" "$GTD_FILE"

# Display confirmation
bun run "${CLAUDE_PLUGIN_ROOT}/tools/gtd-display.ts" capture "$ID" "$TEXT" --list "$LIST"

After Capture

Tell the user:

  • The item was captured with its ID
  • If it went to inbox: "Run /gtd:clarify to clarify it when ready."
  • If it went to Someday/Maybe: "Review during your weekly /gtd:review."

Read the full file on GitHub · 78 lines

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.

  1. yesterday First seen · 78 lines · 29 tokens per session scan A e4578d759b18

Subscribe to this mod's changes

capture is a command published in the GitHub repository MadAppGang/magus (9 stars, last pushed yesterday), licensed MIT. It adds 29 tokens to every session and 688 once invoked, about $0.0001 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 2026-09-04.