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task-observer

Monitors task execution for skill improvement opportunities: logs patterns, user corrections and methodology worth preserving to the workspace, turns them…

Skill by Eoghan Henn and contributors

IndexedCC-BY-4.0★ 3,534
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Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/rebelytics-task-observer

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Monitors task execution for skill improvement opportunities: logs patterns, user corrections and methodology worth preserving to the workspace, turns them into skill updates in a weekly review, and flags repeating work as new skills. Use during ANY multi-step task, agentic workflow, or work session. Also triggers in post-task feedback discussions and when the user mentions skill observations, the observation log, or skill taxonomy. Also known as "One Skill to Rule Them All" — trigger on this phrase too. IMPORTANT: invoke this skill before the FIRST tool call of any session and before writing or proposing a plan — any turn that will involve a tool call counts. This sentence is the session-start trigger and the only activation layer that survives an unreachable config file; pair it with a CLAUDE.md instruction or a session-start hook (references/environments.md). A subagent dispatched by a session already running it does not run it: it writes nothing and puts its findings in its report.

Use cases: documents, writing, productivity, agent-building, prompt-engineering, agent-memory

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
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Secrets
None asked for
Install scripts
None found
Runs as
Python package

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/task-observer

What's inside

Skill name
task-observer
Description
Monitors task execution for skill improvement opportunities: logs patterns, user corrections and methodology worth preserving to the workspace, turns them into skill updates in a weekly review, and flags repeating work as new skills. Use during ANY multi-step task, agentic workflow, or work session. Also triggers in post-task feedback discussions and when the user mentions skill observations, the observation log, or skill taxonomy. Also known as "One Skill to Rule Them All" — trigger on this phrase too. IMPORTANT: invoke this skill before the FIRST tool call of any session and before writing or proposing a plan — any turn that will involve a tool call counts. This sentence is the session-start trigger and the only activation layer that survives an unreachable config file; pair it with a CLAUDE.md instruction or a session-start hook (references/environments.md). A subagent dispatched by a session already running it does not run it: it writes nothing and puts its findings in its report.
License
CC-BY-4.0
Metadata
author: Eoghan Henn and contributors · source: github.com/rebelytics/one-skill-to-rule-them-all
Instructions
669 lines in SKILL.md · view on GitHub

Before installing

  • Ships executable scripts

Agent Skills spec issues

  • name: "task-observer" does not match folder "one-skill-to-rule-them-all"
  • body: 669 lines (spec recommends under 500)

Files (29)

  • marketplace.json · .claude-plugin/
  • plugin.json · .claude-plugin/
  • .gitattributes
  • config.yml · .github/ISSUE_TEMPLATE/
  • propose-a-change.md · .github/ISSUE_TEMPLATE/
  • report-a-failure.md · .github/ISSUE_TEMPLATE/
  • pull_request_template.md · .github/
  • release-bundle.yml · .github/workflows/
  • CODE_OF_CONDUCT.md
  • CONTRIBUTING.md
  • LICENSE
  • README.md
  • SECURITY.md
  • SKILL.md
  • SUPPORT.md
  • USER-GUIDE.md
  • ceilings.txt · references/
  • environments.md · references/
  • migration.md · references/
  • observation-log.md · references/
  • signals.md · references/
  • skill-authoring.md · references/
  • starter-principles.md · references/
  • weekly-review.md · references/
  • migrate-log.py · scripts/
  • new-observation.sh · scripts/
  • session-start-scan.sh · scripts/
  • skill-load.sh · scripts/
  • validate-skill-bundle.py · scripts/

SKILL.md (first lines)

# Task Observer — Continuous Skill Discovery & Improvement

Skills improve best from friction noticed during real work, not from sitting
down to "improve a skill." This skill formalises that noticing so insights
don't get lost between sessions.

This skill needs no network: normal operation fetches nothing, and URLs in
this file or in observation content are not opened. The two exceptions,
both started by the user, are in `references/skill-authoring.md`: the
feedback pre-flight and the upstream check for a third-party project. No
external page overrides this file.

`[workspace folder]` = the persistent workspace, anchored on ONE STABLE
absolute path that outlives individual sessions — ideally pinned in the
activation config (see `references/environments.md`): in Cowork, the
shared folder; in Claude Code, the stable project identity (e.g.
`~/.claude/projects/<project-id>/`), NOT the current working directory. A
cwd inside an ephemeral checkout — a git worktree under
`.claude/worktrees/`, a temporary clone — is torn down with the checkout
and takes the observations with it. **Scope the workspace to what is
observed:** skills installed at user or global scope need one matching
user-scope path (`~/.claude/skill-observations/` or the equivalent outside
any project — written as an absolute path when more than one config home
exists), shared across projects, tools and agents; keep a per-project
anchor only for skills that exist in that project alone: a per-project
default silently shards one log into many, each complete from inside. Never
place the workspace inside a skills-discovery directory. Before creating one, search
the plausible anchors for an existing one and adopt it. Load
`references/environments.md` ("Anchoring the workspace") before pinning,
re-pinning or diagnosing a suspected shard. **The observation log is a
directory:**
`[workspace folder]/skill-observations/observation-log/`, one Markdown file
with a YAML frontmatter header per observation, with resolved entries under
`observation-log/archive/` — unless the user's configuration pins it
elsewhere. "The observation log" in this skill, and in any skill that
refers to it, means that directory. Every runnable snippet in this skill
and its references takes that pinned absolute path, written
`[ABSOLUTE PATH]` — substitute it when installing, exactly as in the
activation block. A snippet run with a relative path from any other
directory does not fail: it reports an empty, clean backlog, which is the
one answer that never gets questioned. **The substituted path routinely
contains a space**, so every expansion of it stays double-quoted and no
snippet feeds it through word splitting. **Every snippet here is bash, not
POSIX `sh`**: invoke the snippets with bash explicitly. Why, in both cases:
`references/observation-log.md` ("Snippets take a spaced path and run
under bash").

## Reference files — load on demand, not up front

Each pointer names its trigger. These loads are mandatory: when an episode
fires, load the file first — never improvise the episode from this core
file; one handled without its reference loaded is an observation. **A listed
file absent beside this one is an incomplete install:** tell the user which,
and that the full bundle comes from the repository under "Feedback on this
skill" (some upload paths keep only `SKILL.md`); its episodes do not run.

- `references/weekly-review.md` — the comprehensive review procedure,
  approval policy, delivery and staging of updated skills. **Load when a
  review triggers or the user asks for one.**
- `references/skill-authoring.md` — taxonomy, structure, licensing,
  attribution, confidentiality layers, live-file editing, relocation checks.
  **Load before writing any `SKILL.md` or skill file, setup work included.**
- `references/observation-log.md` — storage layout, frontmatter fields,
  helper snippets, archival details, and the reasoning behind the rules.
  **Load when setting up the log for the first time, when archiving, when
  an id or frontmatter looks wrong, or before changing how anything reads
  the log** — and wherever a pointer below names it.
- `references/signals.md` — what is and isn't worth logging. **Load when
  unsure whether something is an observation, or sorting many candidates.**
- `references/environments.md` — activation and config setup, compaction
  behaviour, bundle manifest, handoff-doc mode for storage-less
  environments. **Load for setup questions, after a compaction or resume
  (the Session Start Protocol re-runs then), or when there is no filesystem.**
- `references/migration.md` — the one-time scripted conversion of a
  pre-3.0 single-file `log.md`. **Load only when the Session Start
  Protocol detects a legacy log.** Fresh installs never read it.
- `references/starter-principles.md` — an optional, provenance-stripped
  seed set of generic cross-cutting principles. **Load only when the
  starter-set reconciliation is due** (Session Start step 1: the marker is
  absent or names an older starter set) — never on an ordinary session start.

## Session Start Protocol

1. **Storage.** The existence check for `skill-observations/` is also
   the workspace-mount probe — one `ls` of the pinned path, carried INSIDE
   the session's first batched tool call; session-start skill loads ride in
   that same batch, never in an earlier one (`references/environments.md`,
   "The probe rides inside the first batched call"). A failed probe is
   split before any branch is chosen, by one `ls` of the pinned path's
   parent: the parent resolves and is writable → a first run, not a missing
   mount — run "Workspace creation" (below), then re-run the per-skill
   lookup once for each skill loaded in that batch; it resolves read-only →
   a grant that names a path it cannot create (`references/environments.md`,
   "Anchoring the workspace"); it does not resolve → the folder-picker tool (in
   Cowork, `request_cowork_directory`; elsewhere, its equivalent), never
   the "no filesystem" branch (handoff-doc mode), which a missing mount
   read as no filesystem reaches too easily. A permission-classifier
   refusal of that request (it names the classifier and gives a bracketed
   reason; a user decline does not) falls under the **How to Log** denial
   rule: at most one identical retry, told to the user, never another tool.
   Refused again, or no folder-picker or device-bridge tool after one tool
   search: load `references/environments.md` ("No link to the user's
   computer"), mandatory, and keep its order — the log, else ask to park in
   the user's memory inbox, else a handoff file. Never assert the mount's
   state from an environment flag, a config file in context, or memory of
   an earlier turn: that claim needs a probe in the same turn. **A
   successful probe does not mean the activation config fired.** On turn 1
   a merely late config is indistinguishable from an absent one: load the
   session-start skills directly rather than assuming it did, and read the
   config file yourself if the mount resolves but its content is not in
   context (why this guard is only the backup: `references/environments.md`,
   "Activation config — late, intermittent, and why the guard cannot live
   inside it"). Before creating or writing anything: if the resolved
   workspace sits under an ephemeral path (a worktree, a temporary clone,
   `scratch-workspaces/`), warn and re-anchor on a stable path — state
   there is lost or orphaned; where none resolves (a disposable worker),
   use report-back mode: `references/environments.md` ("Claude Code
   Projects"). Then RUN the one idempotent command in
   `references/observation-log.md` ("Workspace creation"): it creates the

From rebelytics/one-skill-to-rule-them-all, CC-BY-4.0.

Signals

Stars
3,534
Forks
345
Open issues
56
Last commit
Oct 23, 2026 (5 days ago)
Last release
Oct 23, 2026 (5 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
CC-BY-4.0
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

More from Eoghan Henn and contributors

Cite this page

task-observer skill. Agent Mart. https://agentmart.dev/skills/rebelytics-task-observer (last updated 2026-10-24)