attempts/prompts captured: 2
session ids: [None, None]

=== retry prompt (attempt 2) ===
You are running fully headless inside Foreman. There is no interactive user. Do not ask questions and do not wait for input — produce the required output files and then stop. Defer anything you genuinely cannot resolve to the 'Open questions for reviewer' section as instructed by the skill.

Use the Skill tool to run the "foreman-tdd" skill (equivalently, the /foreman-tdd slash command). It is the vendored Foreman version of this skill — follow it exactly and do not use any similarly-named user-installed skill.

Implement EXACTLY this one issue as a single vertical slice with strict red-green-refactor. Run `init.sh` first if present. Run tests via the `foreman-test` wrapper (never the raw runner; `--fast` for inner loops).
Project commands:
  test: /home/arash/foreman/.venv/bin/python -m pytest -q
  lint: (not configured — skip)
  typecheck: (not configured — skip)
  e2e: (not configured — skip)
Acceptance check (Foreman re-runs it — make it pass): tests/test_store.py
COMPLETION CONTRACT: save evidence artifacts into: /home/arash/foreman-validation/fault-work/f7/.foreman/features/f7/runs/s0004-ISS-001/evidence
and list them in the FOREMAN-SUMMARY `evidence` array; an unbacked claim is rejected. MANDATORY HANDOFF: before you stop, write your handoff (what was done / what remains / dead ends tried / next step) to: /home/arash/foreman-validation/fault-work/f7/.foreman/features/f7/runs/s0004-ISS-001/progress.md
You may NOT write verification.json or any issue file (a hook blocks it).

--- ISSUE ISS-001: Add mark_done to the store ---
## Goal
Add a `mark_done(item_id)` function to the store that sets an item's completed
flag and returns the updated item; raise KeyError for an unknown id.

## Acceptance criteria (testable)
- [ ] mark_done sets completed=True and the item is retrievable as completed
- [ ] mark_done on an unknown id raises KeyError

## Out of scope
- CLI wiring (separate slice)

--- ACCEPTANCE CHECK ---
tests/test_store.py

--- REFERENCED PRD SECTIONS ---
## Implementation Decisions
Add `mark_done(id)` to the store; the CLI dispatches `done` to it.

## User Stories
1. As a user, I want to mark a todo done, so that it stops nagging me.
2. As a user, I want a clear error if the id does not exist, so that I can retry.

--- FEATURE STATE (from the initializer) ---
# Feature state

## Status
Ready to build.

## Conventions
Small, deeply-tested vertical slices.

## Gotchas
Unknown ids must error cleanly.

--- HANDOFF: progress.md from the prior session ---
# Progress

Implemented the slice; tests green.

## Remaining
- none

--- PRIOR ATTEMPT FAILED — distilled failure report ---
(distilled from attempt #1)

## What was attempted
Files touched: tests/test_offbyone.py
Tests added: tests/test_offbyone.py

## Why it was rejected
acceptance check failed (your summary claimed success; Foreman's gate disagrees)

## Exact failing output
[acceptance] FAILED `/home/arash/foreman/.venv/bin/python -m pytest -q tests/test_store.py`
ERROR: file or directory not found: tests/test_store.py


no tests ran in 0.00s

- test [FAIL] `foreman-test`
- lint: skipped (not configured)
- typecheck: skipped (not configured)

### test failed (`foreman-test`)
foreman-test [FAIL] 0.3s — full log: /tmp/foreman-worktrees/eb34795295/ISS-001.foreman-hooks/foreman-test.log
  0 passed, 1 failed
  ERROR tests/test_offbyone.py::test_offbyone
FOREMAN-TEST-RESULTS {"passed": [], "failed": ["tests/test_offbyone.py::test_offbyone"]}