<!-- event: create author: LocalTicketBackend at: 2026-06-08T10:31:33Z -->

## 作成

LocalTicketBackend によって作成されました。

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<!-- event: intake_summary author: intake at: 2026-06-08T10:31:40Z -->

## Intake summary

チャットビューの TUI で Markdown pipe table が読み取り可能に描画できない不具合を bug Ticket として整理した。対象 surface は通常の chat / conversation view に限定し、session history / Pod metadata / worker history / prompt context は変更しないことを invariant とした。通常の pipe table 表示、既存 Markdown/plain text の非退行、狭い terminal での安全な表示、関連テストまたは手動確認を受け入れ条件にしている。

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<!-- event: state_changed author: intake at: 2026-06-08T10:31:40Z from: planning to: ready reason: planning_ready field: workflow_state -->

## State changed

要件・受け入れ条件・invariant・validation が揃っており、Orchestrator が implementation routing できる状態になった。

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<!-- event: state_changed author: workspace-panel at: 2026-06-08T13:13:23Z from: ready to: queued reason: queued field: workflow_state -->

## State changed

Ticket を `workspace-panel` が queued にしました。


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<!-- event: state_changed author: orchestrator at: 2026-06-08T13:15:07Z from: queued to: inprogress reason: orchestrator_acceptance field: workflow_state -->

## State changed

Accepted queued implementation after reading the Ticket and current workspace state. This is a bounded TUI chat rendering bug fix and is independent of the active Ticket backend/orchestration-plan worktree, so it can proceed in a separate worktree without overlapping source surfaces beyond normal validation.

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<!-- event: decision author: orchestrator at: 2026-06-08T13:15:07Z -->

## Decision

Routing decision: implementation_ready

Reason:
- The Ticket is scoped to the normal TUI chat/conversation view and has concrete acceptance criteria for pipe-table readability, non-regression, narrow terminal behavior, and tests/manual confirmation.
- It explicitly excludes Pod/session/history/context changes and non-chat surfaces.
- Current active implementation work is in Ticket backend/orchestration-plan tooling; this TUI rendering fix has low source-conflict risk and can proceed in a separate worktree.

IntentPacket:

Intent:
- Make ordinary Markdown pipe tables in assistant chat messages readable in the TUI conversation view without changing persisted history or model context.

Binding decisions / invariants:
- Only display/rendering behavior should change; do not mutate Pod history, session logs, worker history, prompt context, or stored message text for rendering.
- Target the normal chat/conversation view. Do not treat this as a Ticket panel, `yoi ticket show`, docs rendering, or WebFetch extraction feature.
- Do not pursue full GitHub Flavored Markdown table compatibility unless it falls out naturally from a small implementation; ordinary pipe tables are the acceptance target.
- Rendering must be robust: malformed or too-wide tables should not panic, drop message content, or break the surrounding message block.
- Preserve existing behavior for non-table Markdown/plain text as much as possible.
- Avoid broad rendering abstraction rewrites or new large parser dependencies unless investigation proves they are necessary; escalate first if so.

Implementation latitude:
- Coder may either add explicit table handling to the existing Markdown renderer or normalize table blocks into a readable plain-text fallback within the rendering layer.
- Column width/alignment/wrapping can be pragmatic and constrained by the existing TUI line/wrap model.
- Add unit/snapshot-like tests around the rendering function or a narrow test fixture for chat message rendering. If interactive manual verification is needed, include exact steps in the implementation report.

Escalate if:
- A large Markdown parser dependency or public rendering API redesign is needed.
- The change requires touching broad TUI surfaces outside chat/conversation rendering.
- Correctness would require changing stored message/history representation.

Validation:
- Focused TUI Markdown/chat rendering tests covering a simple pipe table and non-table regression.
- Narrow-terminal/wrapping safety test if feasible.
- Relevant `cargo test -p tui ...` target(s).
- `cargo fmt --check`.
- `git diff --check`.
- `cargo check --workspace`.
- `nix build .#yoi` before final completion because TUI/package behavior changes.

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<!-- event: implementation_report author: orchestrator at: 2026-06-08T13:16:57Z -->

## Implementation report

Implementation routing started.

Worktree/branch:
- Worktree: `.worktree/tui-chat-markdown-table-rendering`
- Branch: `tui-chat-markdown-table-rendering`
- Base/routing commit: `60609ec ticket: route tui markdown table rendering`

Spawned sibling Coder Pod:
- `coder-tui-chat-markdown-table-rendering`
- Scope: non-recursive read on parent workspace root plus recursive write limited to the child worktree.

Note: an unrelated Ticket record update (`tui-composer-history-persistence` ready state) and project known-issues/objective records were committed before routing so the main workspace was clean enough for implementation side effects.

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<!-- event: implementation_report author: orchestrator at: 2026-06-08T13:26:21Z -->

## Implementation report

Coder implementation completed and is ready for sibling review.

Coder Pod:
- `coder-tui-chat-markdown-table-rendering`
- Commit: `f767ec7a5945aff588fe0b8ce224b30efe4c2a85 tui: render markdown pipe tables in chat`
- Worktree status before review: clean branch `tui-chat-markdown-table-rendering`
- Stopped after collecting output to reclaim delegated worktree scope.

Implementation summary:
- Adds `pulldown-cmark` table event handling to `crates/tui/src/markdown.rs`.
- Enables `Options::ENABLE_TABLES` in the TUI chat Markdown renderer.
- Converts ordinary Markdown pipe tables into readable monospace rows with box separators and alignment-aware padding.
- Keeps changes in the rendering layer only; no Pod/session/history/context storage changes.
- Adds focused tests for readable table rendering, malformed/ragged/wide safety, and non-table pipe text regression.

Coder-reported validation:
- `cargo test -p tui markdown -- --nocapture` -> 17 passed
- `cargo fmt --check` -> OK
- `git diff --check` -> OK
- `cargo check --workspace` -> OK
- `nix build .#yoi` -> OK

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<!-- event: review author: reviewer at: 2026-06-08T13:28:34Z status: approve -->

## Review: approve

Approve.

Review evidence:
- Reviewed commit `f767ec7a5945aff588fe0b8ce224b30efe4c2a85` on branch `tui-chat-markdown-table-rendering`; the only changed source file is `crates/tui/src/markdown.rs`.
- The change stays in the TUI Markdown rendering layer: it enables `pulldown_cmark::Options::ENABLE_TABLES` in the existing renderer and collects/renders table events into display-only `Line` output. I did not find changes to Pod history, session logs, worker history, prompt context, or stored message text.
- The renderer is used by the normal assistant chat/conversation rendering path (`ui.rs`) and this commit does not touch Ticket panel, `yoi ticket show`, docs rendering, or WebFetch extraction surfaces.
- Table rendering keeps cell text for ragged/extra-column rows, pads missing cells, computes display widths with `unicode-width`, and falls back to ordinary event handling for non-table Markdown. Tests cover simple tables, alignment, ragged/too-wide safety, malformed table fallback, and non-table pipe text.

Validation run from the worktree:
- `cargo test -p tui markdown -- --nocapture` passed.
- `cargo fmt --check` passed.
- `git diff --check f767ec7a5945aff588fe0b8ce224b30efe4c2a85^ f767ec7a5945aff588fe0b8ce224b30efe4c2a85` passed.
- `cargo check --workspace` passed.
- `nix build .#yoi` passed.

No blocking issues found.

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<!-- event: implementation_report author: orchestrator at: 2026-06-08T13:29:26Z -->

## Implementation report

Merge-ready dossier for human/orchestrator approval.

Status:
- Implementation branch: `tui-chat-markdown-table-rendering`
- Worktree: `.worktree/tui-chat-markdown-table-rendering`
- Commit under review: `f767ec7a5945aff588fe0b8ce224b30efe4c2a85 tui: render markdown pipe tables in chat`
- Reviewer: `reviewer-tui-chat-markdown-table-rendering`
- Review result: approved; no blocking findings.

Intent / invariant check:
- Makes ordinary Markdown pipe tables readable in the normal TUI chat/conversation Markdown renderer.
- Changes display/rendering behavior only.
- Does not mutate Pod history, session logs, worker history, prompt context, or stored message text.
- Does not expand scope to Ticket panel, `yoi ticket show`, docs rendering, or WebFetch extraction.
- Does not add a new large Markdown dependency or broad TUI rendering abstraction rewrite.

Implementation summary:
- Enables `pulldown-cmark` `Options::ENABLE_TABLES` in `crates/tui/src/markdown.rs`.
- Adds table event collection/rendering into readable monospace rows with separators and alignment-aware padding.
- Keeps ragged/extra-column/wide table content visible and pads missing cells.
- Adds focused tests for simple table rendering, ragged/wide safety, and non-table pipe text regression.

Validation evidence:
- Coder reported pass:
  - `cargo test -p tui markdown -- --nocapture`
  - `cargo fmt --check`
  - `git diff --check`
  - `cargo check --workspace`
  - `nix build .#yoi`
- Reviewer independently ran and passed:
  - `cargo test -p tui markdown -- --nocapture`
  - `cargo fmt --check`
  - `git diff --check f767ec7a5945aff588fe0b8ce224b30efe4c2a85^ f767ec7a5945aff588fe0b8ce224b30efe4c2a85`
  - `cargo check --workspace`
  - `nix build .#yoi`

Residual risks / notes:
- This is intentionally a pragmatic table renderer, not a full GFM table compatibility project.
- Final merge/close/cleanup is intentionally not performed here without explicit merge approval.

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<!-- event: state_changed author: hare at: 2026-06-08T23:36:49Z from: inprogress to: done reason: closed field: workflow_state -->

## State changed

Ticket closed; workflow_state を done に設定しました。


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<!-- event: close author: hare at: 2026-06-08T23:36:49Z status: closed -->

## 完了

Implemented, reviewed, merged, and validated.

Summary:
- Enabled Markdown table parsing in the existing TUI chat/conversation Markdown renderer.
- Rendered ordinary pipe tables as readable monospace rows with separators and alignment-aware padding.
- Kept the change in display/rendering code only; no Pod history, session logs, worker history, prompt context, or stored message text mutation.
- Added focused tests for readable table rendering, ragged/wide table safety, and non-table pipe text regression.

Implementation:
- Coder commit: `f767ec7 tui: render markdown pipe tables in chat`
- Reviewer approved with no blocking findings.
- Merge commit: `e6bae04 merge: render tui markdown tables`

Validation after merge:
- `cargo fmt --check`
- `git diff --check`
- `cargo run -q -p yoi -- ticket doctor`
- `cargo check --workspace`
- `nix build .#yoi`


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