A tool for tracking developing story arcs across collected briefs. A story arc is an ongoing event or topic that can be added, listed, resolved, and used to label related briefs.

Use it to add a new developing story, view active arcs, or mark an arc as resolved with a note.

It keeps long-running developments organised so they can be followed as they change over time.

story-arcs — Skill for Claude Code by gtapps/hermitd

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 gtapps/hermitd --skill story-arcs

Clone the repo

git clone --depth 1 https://github.com/gtapps/hermitd

Made for: Claude Code.

Or install hermitd-feed, the plugin that ships this one along with the rest of its 7 skills, 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/gtapps/hermitd/story-arcs/github.svg)](https://agentmods.dev/skills/gtapps/hermitd/story-arcs)

Your own site

<a href="https://agentmods.dev/skills/gtapps/hermitd/story-arcs"><img src="https://agentmods.dev/badge/skills/gtapps/hermitd/story-arcs/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/gtapps/hermitd/story-arcs"><img src="https://agentmods.dev/badge/skills/gtapps/hermitd/story-arcs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 844 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	$0.00059	$0.00844
Opus 5.5	$0.00024	$0.00338
Sonnet 5.5	$0.00012	$0.00169
Haiku 4.5	$0.00006	$0.00084

Measured 11d ago against content hash e26431fab692, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

story-arcs 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 11d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

story-arcs — 91% identical, 6 lines differ

plugins/hermitd-feed/skills/story-arcs/SKILL.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Story Arcs

Manage the developing-story-arcs file that feeds the feed-brief arc-tagging enrichment.

Usage

/story-arcs add "<name>" [--started <YYYY-MM-DD>] [--watch "<keywords>"] [--context "<text>"]
/story-arcs resolve "<name>" [--reason "<resolution note>"]
/story-arcs list

Steps

1. Find the active arcs file

Glob .hermit/compiled/story-arcs-*.md. Sort by filename date suffix descending (newest first). Read the most recent. If none exists, create .hermit/compiled/story-arcs-<today>.md with the standard template (frontmatter + ## Active + ## Recently Resolved sections).

2. Execute subcommand

add

Parse: name (required), --started (default: today, prefixed with ~), --watch (optional keyword list), --context (optional description).

Check ## Active — if an arc with the same name already exists (case-insensitive), say so and stop.

Append a new arc block at the end of ## Active:

**<name>** (started: ~<YYYY-MM-DD>)
<context text, or "Newly surfaced — add context as it develops.">
Watch: <watch keywords separated by semicolons, or "TBD">.

Write the file in-place. Reply: Arc added: **<name>**. Update the Watch clause with /story-arcs if needed.

resolve

Parse: name (required, case-insensitive substring match), --reason (optional).

Find the arc block in ## Active. If not found, list close matches and stop.
Remove the full arc block (the **Name** (started:...) line + context line + Watch line).
Insert a one-line entry at the top of ## Recently Resolved:
```
**<name>** — <reason, or "resolved">. <today's date>
```
Write the file in-place. Reply: Arc resolved: **<name>**. It will no longer be matched in future briefs.

list

Display all arcs under ## Active as a compact table: Name, start date, Watch keywords.
Show the count of ## Recently Resolved entries.
If ## Active is empty, say "No active arcs."

File format reference

Read the full file on GitHub · 92 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.

11d ago First seen · 92 lines · 59 tokens per session scan A e26431fab692

Subscribe to this mod's changes

story-arcs is a skill published in the GitHub repository gtapps/hermitd (79 stars, last pushed today), licensed MIT. It adds 59 tokens to every session and 844 once invoked, about $0.0002 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 2026-10-02.

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