Session Skills — Implementation Plan

Spec: docs/superpowers/specs/2026-07-03-session-skills-design.md Approach: subagent-driven TDD (sonnet), build + test + commit per task, stage files by path (never git add -A).

Pre-flight (do first, before building anything): manual smoke test — drop a skill into a scratch worktree's .claude/skills/ and run claude -p to confirm cwd skills are discovered in headless mode. The whole feature rests on this. If it fails, stop and redesign around CLAUDE_CONFIG_DIR.

Task 1 — Data layer: columns + registry table + migration

Add nullable SessionSkills (string, JSON array) to TaskEntity, ListConfigEntity, AppSettingsEntity; map session_skills columns in their *Configuration.cs.
New SessionSkillEntity (name PK, source_url, pinned_ref, description, added_at) + configuration + session_skills table.
New SessionSkillRepository (async, CancellationToken): ListAsync, GetAsync(name), UpsertAsync, DeleteAsync.
EF migration AddSessionSkills (columns + table).
Tests (Data.Tests): repository CRUD on real SQLite; JSON column round-trips a name list.

Task 2 — Registry service (install / update / remove)

Skills/SessionSkillRegistry + Skills/Interfaces/ISessionSkillRegistry, IRepoCloner (clone abstraction so tests inject a local source dir).
GitRepoCloner (production) does git clone + resolves HEAD SHA.
Install: clone → require root SKILL.md → parse YAML frontmatter (name, description) → move to ~/.todo-app/session-skills/<name>/ → upsert row. Reject collision / missing SKILL.md.
Update / Remove per spec.
Tests (Worker.Tests): install from a local fixture dir (fake cloner) parses frontmatter + writes registry + copies files; missing-SKILL.md rejected; collision rejected; remove deletes dir + row. No real network / no real claude CLI.

Task 3 — Resolution: union into ClaudeRunConfig

Add IReadOnlyList<string> SkillNames to ClaudeRunConfig (default empty).
In TaskRunner.ResolveConfigAsync: parse each level's session_skills, union + dedup, filter to registry-existing names (drop + log missing).
Tests (Worker.Tests): union across the three levels; dedup; unknown name dropped.

Task 4 — Seeder

Skills/SessionSkillSeeder + interface. SeedAsync(cwd, skillNames, isWorktree, ct): copy each installed skill dir → <cwd>/.claude/skills/<name>/; if worktree, append /.claude/skills/<name>/ to git rev-parse --git-path info/exclude target if absent.
Wire into TaskRunner after run-dir resolution, before ClaudeProcess.RunAsync (both worktree and sandbox paths).
Tests (Worker.Tests): seeds into real temp dir; idempotent re-seed; worktree exclude line written once and not duplicated; seeded path is git-ignored (real git temp repo → git status clean for the seeded dir).

Task 5 — Hub + DTOs + client

WorkerHub: GetSessionSkills, InstallSessionSkill(url), UpdateSessionSkill(name), RemoveSessionSkill(name).
New SessionSkillDto; extend AppSettingsDto, ListConfigDto, UpdateListConfigDto, UpdateTaskAgentSettingsDto with skill-name lists; map in the update handlers.
IWorkerClient + WorkerClient additions.
Update hand-rolled fakes in Worker.Tests + Ui.Tests (memory iworkerclient_fakes_sync).
Tests: hub method round-trip via existing hub test harness where present.

Task 6 — UI: registry tab + selectors

SessionSkillsSettingsTabViewModel + a Skills tab in SettingsModalView.axaml: installed list, Add (URL), Update, Remove, status line. Mirror FilesSettingsTabViewModel.
Global multi-select in General settings tab → AppSettings.SessionSkills.
Skills multi-select in shared AgentConfigEditor (covers List + Task) with inheritance badge, wired through AgentConfigEditorViewModel.
Localization: add EN + DE keys in parity (Localization.Tests enforces).
Tests (Ui.Tests / Localization.Tests): VM load/save of selections; locale parity.
Visual verification is Mika's — flag the gaps.

Task 7 — Wiring, build, end-to-end smoke

DI registration (registry, cloner, seeder) in Program.cs.
Build all touched projects -c Release; run Worker/Data/Ui/Localization test projects.
Manual E2E: install ponytail via the UI, enable per-task, run a task, confirm the skill is available to the agent and not committed and not in interactive sessions.

Commit per task with Conventional Commits (feat(worker|ui|data): …). Commit the spec + plan docs first.

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