Mk story sizer

mk:story-sizer

Forks to the story-sizer agent (system prompt at .codex/agents/story-sizer.md). v1 ships paste-mode only: the user provides a markdown block of stories, the agent applies heuristics, and a Story Sizing Report is written to tasks/reports/story-sizing-{YYMMDD}-{slug}.md. No Jira side effects in default mode.

Triggers

• "size these stories"
• "rough-size from spec"
• "pre-ticket sizing for these user stories"
• "Fibonacci size this story list"
• "story points for these candidates before we create tickets"

Commands

Mode	Invocation	Side effects
Default	the story-sizer skill --paste [--scout] [--story <id>]	Writes Story Sizing Report only. No Jira calls.
Auto-create	the story-sizer skill --paste --auto-create --project <KEY> [--epic <KEY>]	After dry-run + single confirmation, delegates ticket creation per story.

Input

Paste-mode contract: see references/input-adapter.md for the strict markdown template, StoryRecord schema, validation rules, and failure modes. The parser is scripts/parse-paste-stories.py (deterministic; SHA-256 source-hash recorded for the auto-create source-consistency check).

Heuristics

Fibonacci sizing rules: see references/sizing-heuristics.md for complexity dimensions, scoring tables, inconsistency detection, split-proposal triggers, and DoR advisory. Scorer is scripts/score-story.py (integer-arithmetic over text-derived counts; same input → same numeric output).

Output

Report template + slot semantics: references/report-writer.md. Renderer is scripts/write-sizing-report.py. Default path: tasks/reports/story-sizing-{YYMMDD}-{slug}.md. Idempotency by source_hash — repeated runs on the identical paste body re-prompt before overwriting.

Per-story suggested create commands obey the v1 field whitelist: --project, --type, --summary, --story-points, --description, optional --epic, --components, --labels. No --assignee, --priority, --sprint, --blocks, or --custom-fields in v1.

Orchestration

End-to-end default flow + --scout extract-or-prompt pattern + filtering rules: references/orchestration.md. Story-sizer NEVER auto-invokes the scout skill — it extracts existing session output or prompts the user to run scout first.

Auto-create (opt-in)

--auto-create --project <KEY> [--epic <KEY>] runs 5 pre-flight checks (NO_ACS, Rule-1 injection, length cap, duplicate suspect via mk:jira-search, source-hash mismatch). If all pass, a markdown dry-run table renders + a single stop and ask the user in chat gate decides ship-or-abort. Gating rules: references/auto-create-gating.md. Rule-1 inventory copy: references/injection-patterns.md. Gating check: scripts/check-auto-create-gating.py.

See also

• Agent: ../../agents/story-sizer.md
• Peer intelligence: mk:jira-evaluator (post-ticket complexity), mk:jira-estimator (post-ticket estimation), mk:planning-engine (sprint capacity)
• Peer execution (delegated): mk:jira-issue (create), mk:jira-collaborate (audit comment via --internal)
• Shared: ../jira/references/estimation-guide.md (Fibonacci heuristic conventions)

Gotchas

• The source_hash recorded in the report header is the SHA-256 of the exact paste body. If you edit the paste locally between sizing and --auto-create, the source-consistency check will ABORT — re-paste the modified body and re-run --paste to regenerate the report.
• --scout does not auto-invoke the scout skill. Run the scout skill first when you want codebase signals; otherwise the report carries [NO_CODEBASE_CONTEXT].
• DoR advisory only appears when mk:agent-detector loaded the agile story gates rule for the current session.