secondmate-reason

A read-only command that asks a separate reasoning model to analyse a difficult question without changing project files.

In plain words
What is it for?
Use it for root-cause analysis, issue triage, plan reviews, pre-mortems, or questions supported by selected files or diffs.
Why use it?
It provides another analysis without using the current session's context for the reasoning work.

Command

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/eshwarvijay/secondmate/secondmate-reason
Clone the repo
git clone --depth 1 https://github.com/eshwarvijay/secondmate
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 160 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 $0.00038 $0.00160
Opus 5 $0.00019 $0.00080
Sonnet 5 $0.00008 $0.00032
Haiku 4.5 $0.00004 $0.00016

Measured 2d ago against content hash a1d9a9d81ad7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

secondmate-reason 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 2d 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.

commands/secondmate-reason.md · 17 lines

What it actually says

Run the secondmate reasoning one-shot and relay the model's answer verbatim, then add your own one-line take.

Question / task: $ARGUMENTS

Execute:

"${CLAUDE_PLUGIN_ROOT}/bin/reason.sh" "$ARGUMENTS"

If the user's request references a file or diff, pass it with --context <path> (repeatable). Use --model gpt for GPT-5.6 or --model r1 (default) for DeepSeek-R1. This is read-only and tool-free.

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. 2d ago First seen · 17 lines · 38 tokens per session scan A a1d9a9d81ad7

Subscribe to this mod's changes

secondmate-reason is a command published in the GitHub repository eshwarvijay/secondmate (3 stars, last pushed 5d ago), licensed MIT. It adds 38 tokens to every session and 160 once invoked, about $0.0002 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.