story-kit: create 303_story_bot_cost_command_with_story_filter_for_detailed_breakdown

.story_kit/work/1_backlog/300_story_show_token_cost_badge_on_pipeline_board_work_items.md

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-name: "Show token cost badge on pipeline board work items"
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-
-# Story 300: Show token cost badge on pipeline board work items
-
-## User Story
-
-As a project owner viewing the pipeline board, I want to see the total token cost for each work item displayed as a badge, so that I can quickly spot expensive stories at a glance.
-
-## Acceptance Criteria
-
-- [ ] Each work item on the pipeline board shows its total cost in USD as a small badge
-- [ ] Cost is fetched from the token_usage.jsonl data via a new API endpoint
-- [ ] Items with no recorded usage show no badge (not $0.00)
-- [ ] Cost updates when the pipeline refreshes (e.g. after an agent completes)
-- [ ] Expanded work item detail panel shows per-agent cost breakdown (coder, QA, mergemaster) with token counts
-
-## Out of Scope
-
-- TBD

.story_kit/work/1_backlog/301_story_dedicated_token_usage_page_in_web_ui.md

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-name: "Dedicated token usage page in web UI"
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-
-# Story 301: Dedicated token usage page in web UI
-
-## User Story
-
-As a project owner, I want a dedicated token usage page in the web UI that shows per-story and per-agent cost breakdowns with totals, so that I can analyse where tokens are being spent and identify optimisation opportunities.
-
-## Acceptance Criteria
-
-- [ ] New page/panel accessible from the main navigation
-- [ ] Shows a table of all recorded agent sessions with story, agent name, model, token counts, and cost
-- [ ] Sortable by cost, story, agent, or date
-- [ ] Shows summary totals: total cost, cost by agent type (coder vs QA vs mergemaster), cost by model (opus vs sonnet)
-- [ ] Data loads from the token_usage.jsonl log via API endpoint
-
-## Out of Scope
-
-- TBD

.story_kit/work/1_backlog/302_story_bot_cost_command_shows_total_and_per_story_token_spend.md

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-name: "Bot cost command shows total and per-story token spend"
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-
-# Story 302: Bot cost command shows total and per-story token spend
-
-## User Story
-
-As a project owner in a Matrix room, I want to type "{bot_name} cost" to see total token spend and the top most expensive stories, so that I can check burn rate from my phone.
-
-## Acceptance Criteria
-
-- [ ] '{bot_name} cost' shows total spend for the last 24 hours
-- [ ] Shows top 5 most expensive stories from the last 24 hours with their costs
-- [ ] Shows cost breakdown by agent type (coder, QA, mergemaster) for the last 24 hours
-- [ ] Also shows an all-time total for context
-- [ ] Registered in the command registry so it appears in help output
-- [ ] Handled at bot level without LLM invocation
-
-## Out of Scope
-
-- TBD