diff --git a/TODO.md b/TODO.md
index ec1900b8..0dbc84d6 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,26 +1,5 @@
-- Workflow / Skills
-  - 内部 Worker / 内部 Pod の Workflow 化 → [tickets/internal-worker-workflow.md](tickets/internal-worker-workflow.md)
-  - 半自動開発運用 Workflow → [tickets/auto-maintain-workflow.md](tickets/auto-maintain-workflow.md)
-  - tickets.sh による WorkItem / Thread MVP → [tickets/tickets-sh-workitem-thread-mvp.md](tickets/tickets-sh-workitem-thread-mvp.md)
-  - Prompt / Workflow 評価メトリクスと改善 Offer → [tickets/prompt-eval-metrics.md](tickets/prompt-eval-metrics.md)
-- Permission: allow-all 既定 policy への整理 → [tickets/permission-default-policy.md](tickets/permission-default-policy.md)
-- Pod: 任意ターンからの Fork（複数ターン巻き戻しを汎用化） → [tickets/pod-session-fork.md](tickets/pod-session-fork.md)
-- Pod/TUI: 手動 rollback 導線 → [tickets/manual-turn-rollback.md](tickets/manual-turn-rollback.md)
-- Pod: Inbound PodEvent ハンドリングの重複を統合 → [tickets/pod-inbound-pod-event-dedup.md](tickets/pod-inbound-pod-event-dedup.md)
-- Pod: scope 永続化 authority の整理 → [tickets/pod-scope-persistence-authority.md](tickets/pod-scope-persistence-authority.md)
-- SpawnPod 初回 task delivery の受理確認 → [tickets/spawnpod-initial-run-confirmation.md](tickets/spawnpod-initial-run-confirmation.md)
-- E2E テストハーネス（`tests/e2e/`、opt-in） → [tickets/e2e-harness.md](tickets/e2e-harness.md)
-- メモリ機構
-  - memory / knowledge tool 利用タイミングのプロンプトガイダンス → [tickets/memory-tool-guidance-prompt.md](tickets/memory-tool-guidance-prompt.md)
-- TUI 拡充
-  - navigation mode / block focus の設計 → [tickets/tui-navigation-mode-design.md](tickets/tui-navigation-mode-design.md)
-  - spawned child Pod の一覧と一時 attach → [tickets/tui-spawned-pod-panel.md](tickets/tui-spawned-pod-panel.md)
-  - actionbar transient notice API → [tickets/tui-actionbar-transient-notice-api.md](tickets/tui-actionbar-transient-notice-api.md)
-  - tui -r picker で live pending Pod が表示から漏れる → [tickets/tui-picker-live-pending-pods.md](tickets/tui-picker-live-pending-pods.md)
-  - ユーザーマニフェストのモデル設定 wizard → [tickets/tui-user-model-setup.md](tickets/tui-user-model-setup.md)
-- セッション内 Task ツールの注意機構（無アクティビティで `<system-reminder>` ナッジ） → [tickets/session-todo-reminder.md](tickets/session-todo-reminder.md)
-- ワークスペースのメモリーをLintするヘッドレスCLI
-- system-reminder 注入機構の汎用化（2件目の利用者が出た時に検討。タグ形式 `<system-reminder>...</system-reminder>` の規約は session-todo-reminder で先行確立。注入された Item は worker.history に append する方針）
-- Bashツールがファイル編集に常用されている問題をdesciptionで抑制
-- 事前定義したManifestをProfile的に扱い、Orchestrator/Coder/Researcherで別々のモデル/設定を使わせる運用ができるようにする
-- 複数のPodのViewを行き来できるUI
+# TODO legacy notice
+
+Active repository work items have been migrated to `work-items/`.
+
+Use `./tickets.sh list --status all` for the generated/current view and `./tickets.sh doctor` to validate the migration state.
diff --git a/tickets.sh b/tickets.sh
new file mode 100755
index 00000000..4bf31281
--- /dev/null
+++ b/tickets.sh
@@ -0,0 +1,539 @@
+#!/bin/sh
+set -eu
+
+WORK_ITEMS_DIR=${WORK_ITEMS_DIR:-work-items}
+STATUSES="open pending closed"
+REQUIRED_FIELDS="id slug title status kind priority labels created_at updated_at assignee legacy_ticket"
+
+usage() {
+    cat <<'EOF'
+tickets.sh - repository-local WorkItem / Thread helper
+
+Usage:
+  ./tickets.sh help
+  ./tickets.sh --help
+  ./tickets.sh list [--status open|pending|closed|all]
+  ./tickets.sh show <id-or-slug>
+  ./tickets.sh create --title <title> [--slug <slug>] [--kind <kind>] [--priority P2] [--label a,b]
+  ./tickets.sh comment <id-or-slug> [--role comment|plan|decision|implementation_report] [--author <name>] [--file <path>]
+  ./tickets.sh review <id-or-slug> --approve|--request-changes [--author <name>] [--file <path>]
+  ./tickets.sh status <id-or-slug> open|pending|closed
+  ./tickets.sh close <id-or-slug> [--resolution <text>|--file <path>]
+  ./tickets.sh doctor
+
+Backend:
+  work-items/{open,pending,closed}/<id>/item.md
+  work-items/{open,pending,closed}/<id>/thread.md
+  work-items/{open,pending,closed}/<id>/artifacts/
+
+Migration policy:
+  work-items/ is the canonical backend after migration. TODO.md is only a
+  legacy/generated-view notice. Open items must not remain as tickets/*.md, and
+  review notes must be appended to thread.md instead of tickets/*.review.md.
+EOF
+}
+
+die() {
+    printf 'error: %s\n' "$*" >&2
+    exit 1
+}
+
+now_utc() {
+    date -u '+%Y-%m-%dT%H:%M:%SZ'
+}
+
+compact_date() {
+    date -u '+%Y%m%d-%H%M%S'
+}
+
+ensure_backend_dirs() {
+    mkdir -p "$WORK_ITEMS_DIR/open" "$WORK_ITEMS_DIR/pending" "$WORK_ITEMS_DIR/closed"
+}
+
+is_status() {
+    case "$1" in
+        open|pending|closed) return 0 ;;
+        *) return 1 ;;
+    esac
+}
+
+slugify() {
+    # ASCII-focused slugifier for POSIX shell. Non-ASCII titles should pass --slug.
+    printf '%s' "$1" |
+        tr '[:upper:]' '[:lower:]' |
+        sed 's/[^a-z0-9][^a-z0-9]*/-/g; s/^-//; s/-$//; s/--*/-/g'
+}
+
+field_value() {
+    file=$1
+    field=$2
+    awk -v key="$field" '
+        NR == 1 && $0 == "---" { in_fm = 1; next }
+        in_fm && $0 == "---" { exit }
+        in_fm {
+            prefix = key ":"
+            if (index($0, prefix) == 1) {
+                value = substr($0, length(prefix) + 1)
+                sub(/^[[:space:]]*/, "", value)
+                print value
+                exit
+            }
+        }
+    ' "$file"
+}
+
+set_frontmatter_field() {
+    file=$1
+    field=$2
+    value=$3
+    tmp=${TMPDIR:-/tmp}/tickets-sh.$$.tmp
+    awk -v key="$field" -v new_value="$value" '
+        NR == 1 && $0 == "---" { in_fm = 1; print; next }
+        in_fm && $0 == "---" { in_fm = 0; print; next }
+        in_fm {
+            prefix = key ":"
+            if (index($0, prefix) == 1) {
+                print key ": " new_value
+                next
+            }
+        }
+        { print }
+    ' "$file" > "$tmp"
+    mv "$tmp" "$file"
+}
+
+find_item_dir() {
+    query=$1
+    matches=${TMPDIR:-/tmp}/tickets-sh.matches.$$
+    : > "$matches"
+    for status in $STATUSES; do
+        for dir in "$WORK_ITEMS_DIR/$status"/*; do
+            [ -d "$dir" ] || continue
+            item=$dir/item.md
+            [ -f "$item" ] || continue
+            id=$(field_value "$item" id || true)
+            slug=$(field_value "$item" slug || true)
+            if [ "$query" = "$id" ] || [ "$query" = "$slug" ]; then
+                printf '%s\n' "$dir" >> "$matches"
+            fi
+        done
+    done
+    count=$(wc -l < "$matches" | tr -d ' ')
+    if [ "$count" -eq 0 ]; then
+        rm -f "$matches"
+        die "work item not found: $query"
+    fi
+    if [ "$count" -gt 1 ]; then
+        cat "$matches" >&2
+        rm -f "$matches"
+        die "ambiguous work item: $query"
+    fi
+    sed -n '1p' "$matches"
+    rm -f "$matches"
+}
+
+item_status_from_dir() {
+    case "$1" in
+        */open/*) printf 'open\n' ;;
+        */pending/*) printf 'pending\n' ;;
+        */closed/*) printf 'closed\n' ;;
+        *) printf 'unknown\n' ;;
+    esac
+}
+
+labels_yaml() {
+    labels=$1
+    if [ -z "$labels" ]; then
+        printf '[]'
+        return
+    fi
+    old_ifs=$IFS
+    IFS=,
+    first=1
+    printf '['
+    for label in $labels; do
+        clean=$(printf '%s' "$label" | sed 's/^[[:space:]]*//; s/[[:space:]]*$//')
+        [ -n "$clean" ] || continue
+        if [ "$first" -eq 0 ]; then
+            printf ', '
+        fi
+        printf '%s' "$clean"
+        first=0
+    done
+    IFS=$old_ifs
+    printf ']'
+}
+
+read_body_to_file() {
+    input_file=$1
+    output_file=$2
+    if [ -n "$input_file" ]; then
+        [ -f "$input_file" ] || die "file not found: $input_file"
+        cat "$input_file" > "$output_file"
+        return
+    fi
+    if [ -t 0 ]; then
+        printf 'No body provided.\n' > "$output_file"
+    else
+        cat > "$output_file"
+    fi
+}
+
+append_thread_event() {
+    dir=$1
+    event=$2
+    heading=$3
+    author=$4
+    status_value=$5
+    body_file=$6
+    at=$(now_utc)
+    thread=$dir/thread.md
+    [ -f "$thread" ] || : > "$thread"
+    {
+        printf '\n<!-- event: %s author: %s at: %s' "$event" "$author" "$at"
+        if [ -n "$status_value" ]; then
+            printf ' status: %s' "$status_value"
+        fi
+        printf ' -->\n\n'
+        printf '## %s\n\n' "$heading"
+        cat "$body_file"
+        printf '\n\n---\n'
+    } >> "$thread"
+    set_frontmatter_field "$dir/item.md" updated_at "$at"
+}
+
+cmd_list() {
+    status_filter=open
+    while [ "$#" -gt 0 ]; do
+        case "$1" in
+            --status)
+                [ "$#" -ge 2 ] || die "--status requires a value"
+                status_filter=$2
+                shift 2
+                ;;
+            *) die "unknown list argument: $1" ;;
+        esac
+    done
+    case "$status_filter" in
+        open|pending|closed|all) ;;
+        *) die "invalid status: $status_filter" ;;
+    esac
+
+    printf '%s\t%s\t%s\t%s\t%s\t%s\t%s\n' status id slug title kind priority updated_at
+    for status in $STATUSES; do
+        if [ "$status_filter" != all ] && [ "$status_filter" != "$status" ]; then
+            continue
+        fi
+        for dir in "$WORK_ITEMS_DIR/$status"/*; do
+            [ -d "$dir" ] || continue
+            item=$dir/item.md
+            [ -f "$item" ] || continue
+            printf '%s\t%s\t%s\t%s\t%s\t%s\t%s\n' \
+                "$(field_value "$item" status)" \
+                "$(field_value "$item" id)" \
+                "$(field_value "$item" slug)" \
+                "$(field_value "$item" title)" \
+                "$(field_value "$item" kind)" \
+                "$(field_value "$item" priority)" \
+                "$(field_value "$item" updated_at)"
+        done
+    done
+}
+
+cmd_show() {
+    [ "$#" -eq 1 ] || die "show requires <id-or-slug>"
+    dir=$(find_item_dir "$1")
+    item=$dir/item.md
+    thread=$dir/thread.md
+    printf '# %s\n\n' "$(field_value "$item" title)"
+    printf 'Path: %s\n' "$dir"
+    printf 'Status: %s\n' "$(field_value "$item" status)"
+    printf 'ID: %s\n' "$(field_value "$item" id)"
+    printf 'Slug: %s\n\n' "$(field_value "$item" slug)"
+    printf '## item.md\n\n'
+    cat "$item"
+    printf '\n\n## thread.md\n\n'
+    if [ -f "$thread" ]; then
+        tail -n 80 "$thread"
+    else
+        printf '(missing thread.md)\n'
+    fi
+}
+
+cmd_create() {
+    title=
+    slug=
+    kind=task
+    priority=P2
+    labels=
+    while [ "$#" -gt 0 ]; do
+        case "$1" in
+            --title) [ "$#" -ge 2 ] || die "--title requires a value"; title=$2; shift 2 ;;
+            --slug) [ "$#" -ge 2 ] || die "--slug requires a value"; slug=$2; shift 2 ;;
+            --kind) [ "$#" -ge 2 ] || die "--kind requires a value"; kind=$2; shift 2 ;;
+            --priority) [ "$#" -ge 2 ] || die "--priority requires a value"; priority=$2; shift 2 ;;
+            --label) [ "$#" -ge 2 ] || die "--label requires a value"; labels=$2; shift 2 ;;
+            *) die "unknown create argument: $1" ;;
+        esac
+    done
+    [ -n "$title" ] || die "create requires --title"
+    if [ -z "$slug" ]; then
+        slug=$(slugify "$title")
+    else
+        slug=$(slugify "$slug")
+    fi
+    [ -n "$slug" ] || slug=item
+    ensure_backend_dirs
+    stamp=$(compact_date)
+    id=$stamp-$slug
+    dir=$WORK_ITEMS_DIR/open/$id
+    if [ -e "$dir" ]; then
+        id=$id-$$
+        dir=$WORK_ITEMS_DIR/open/$id
+    fi
+    created=$(now_utc)
+    mkdir -p "$dir/artifacts"
+    : > "$dir/artifacts/.gitkeep"
+    cat > "$dir/item.md" <<EOF
+---
+id: $id
+slug: $slug
+title: $title
+status: open
+kind: $kind
+priority: $priority
+labels: $(labels_yaml "$labels")
+created_at: $created
+updated_at: $created
+assignee: null
+legacy_ticket: null
+---
+
+## Background
+
+Created by tickets.sh.
+
+## Acceptance criteria
+
+- TBD
+EOF
+    cat > "$dir/thread.md" <<EOF
+<!-- event: create author: tickets.sh at: $created -->
+
+## Created
+
+Created by tickets.sh create.
+
+---
+EOF
+    printf '%s\n' "$id"
+}
+
+cmd_comment() {
+    [ "$#" -ge 1 ] || die "comment requires <id-or-slug>"
+    query=$1
+    shift
+    role=comment
+    author=${USER:-unknown}
+    file=
+    while [ "$#" -gt 0 ]; do
+        case "$1" in
+            --role) [ "$#" -ge 2 ] || die "--role requires a value"; role=$2; shift 2 ;;
+            --author) [ "$#" -ge 2 ] || die "--author requires a value"; author=$2; shift 2 ;;
+            --file) [ "$#" -ge 2 ] || die "--file requires a value"; file=$2; shift 2 ;;
+            *) die "unknown comment argument: $1" ;;
+        esac
+    done
+    dir=$(find_item_dir "$query")
+    body=${TMPDIR:-/tmp}/tickets-sh.body.$$
+    read_body_to_file "$file" "$body"
+    heading=$role
+    case "$role" in
+        comment) heading="Comment" ;;
+        plan) heading="Plan" ;;
+        decision) heading="Decision" ;;
+        implementation_report) heading="Implementation report" ;;
+    esac
+    append_thread_event "$dir" "$role" "$heading" "$author" "" "$body"
+    rm -f "$body"
+}
+
+cmd_review() {
+    [ "$#" -ge 1 ] || die "review requires <id-or-slug>"
+    query=$1
+    shift
+    author=${USER:-unknown}
+    file=
+    review_status=
+    while [ "$#" -gt 0 ]; do
+        case "$1" in
+            --approve) review_status=approve; shift ;;
+            --request-changes) review_status=request_changes; shift ;;
+            --author) [ "$#" -ge 2 ] || die "--author requires a value"; author=$2; shift 2 ;;
+            --file) [ "$#" -ge 2 ] || die "--file requires a value"; file=$2; shift 2 ;;
+            *) die "unknown review argument: $1" ;;
+        esac
+    done
+    [ -n "$review_status" ] || die "review requires --approve or --request-changes"
+    dir=$(find_item_dir "$query")
+    body=${TMPDIR:-/tmp}/tickets-sh.body.$$
+    read_body_to_file "$file" "$body"
+    if [ "$review_status" = approve ]; then
+        heading="Review: approve"
+    else
+        heading="Review: request changes"
+    fi
+    append_thread_event "$dir" review "$heading" "$author" "$review_status" "$body"
+    rm -f "$body"
+}
+
+cmd_status() {
+    [ "$#" -eq 2 ] || die "status requires <id-or-slug> <open|pending|closed>"
+    query=$1
+    new_status=$2
+    is_status "$new_status" || die "invalid status: $new_status"
+    dir=$(find_item_dir "$query")
+    id=$(field_value "$dir/item.md" id)
+    new_dir=$WORK_ITEMS_DIR/$new_status/$id
+    ensure_backend_dirs
+    if [ "$dir" != "$new_dir" ]; then
+        [ ! -e "$new_dir" ] || die "target already exists: $new_dir"
+        mv "$dir" "$new_dir"
+        dir=$new_dir
+    fi
+    set_frontmatter_field "$dir/item.md" status "$new_status"
+    set_frontmatter_field "$dir/item.md" updated_at "$(now_utc)"
+}
+
+cmd_close() {
+    [ "$#" -ge 1 ] || die "close requires <id-or-slug>"
+    query=$1
+    shift
+    resolution=
+    file=
+    while [ "$#" -gt 0 ]; do
+        case "$1" in
+            --resolution) [ "$#" -ge 2 ] || die "--resolution requires a value"; resolution=$2; shift 2 ;;
+            --file) [ "$#" -ge 2 ] || die "--file requires a value"; file=$2; shift 2 ;;
+            *) die "unknown close argument: $1" ;;
+        esac
+    done
+    cmd_status "$query" closed
+    dir=$(find_item_dir "$query")
+    body=${TMPDIR:-/tmp}/tickets-sh.body.$$
+    if [ -n "$file" ]; then
+        read_body_to_file "$file" "$body"
+    elif [ -n "$resolution" ]; then
+        printf '%s\n' "$resolution" > "$body"
+    else
+        printf 'Closed.\n' > "$body"
+    fi
+    cp "$body" "$dir/resolution.md"
+    append_thread_event "$dir" close "Closed" "${USER:-unknown}" closed "$body"
+    rm -f "$body"
+}
+
+doctor_error() {
+    printf 'doctor: %s\n' "$*" >&2
+    DOCTOR_ERRORS=$((DOCTOR_ERRORS + 1))
+}
+
+cmd_doctor() {
+    DOCTOR_ERRORS=0
+    for status in $STATUSES; do
+        [ -d "$WORK_ITEMS_DIR/$status" ] || doctor_error "missing directory: $WORK_ITEMS_DIR/$status"
+    done
+
+    ids=${TMPDIR:-/tmp}/tickets-sh.ids.$$
+    slugs=${TMPDIR:-/tmp}/tickets-sh.slugs.$$
+    : > "$ids"
+    : > "$slugs"
+
+    for status in $STATUSES; do
+        [ -d "$WORK_ITEMS_DIR/$status" ] || continue
+        for dir in "$WORK_ITEMS_DIR/$status"/*; do
+            [ -d "$dir" ] || continue
+            item=$dir/item.md
+            thread=$dir/thread.md
+            artifacts=$dir/artifacts
+            [ -f "$item" ] || { doctor_error "missing item.md: $dir"; continue; }
+            [ -f "$thread" ] || doctor_error "missing thread.md: $dir"
+            [ -d "$artifacts" ] || doctor_error "missing artifacts/: $dir"
+            first=$(sed -n '1p' "$item")
+            [ "$first" = "---" ] || doctor_error "item.md missing frontmatter opener: $item"
+            for field in $REQUIRED_FIELDS; do
+                value=$(field_value "$item" "$field" || true)
+                [ -n "$value" ] || doctor_error "missing required field '$field': $item"
+            done
+            id=$(field_value "$item" id || true)
+            slug=$(field_value "$item" slug || true)
+            fm_status=$(field_value "$item" status || true)
+            if [ -n "$id" ]; then
+                printf '%s\t%s\n' "$id" "$item" >> "$ids"
+                base=$(basename "$dir")
+                [ "$base" = "$id" ] || doctor_error "directory id mismatch: $dir has id $id"
+            fi
+            if [ -n "$slug" ]; then
+                printf '%s\t%s\n' "$slug" "$item" >> "$slugs"
+            fi
+            if [ "$fm_status" != "$status" ]; then
+                doctor_error "status mismatch: $item has '$fm_status' under '$status'"
+            fi
+        done
+    done
+
+    dup_ids=$(cut -f1 "$ids" | sort | uniq -d)
+    if [ -n "$dup_ids" ]; then
+        old_ifs=$IFS
+        IFS='
+'
+        for dup in $dup_ids; do
+            [ -n "$dup" ] && doctor_error "duplicate id: $dup"
+        done
+        IFS=$old_ifs
+    fi
+    dup_slugs=$(cut -f1 "$slugs" | sort | uniq -d)
+    if [ -n "$dup_slugs" ]; then
+        old_ifs=$IFS
+        IFS='
+'
+        for dup in $dup_slugs; do
+            [ -n "$dup" ] && doctor_error "duplicate slug: $dup"
+        done
+        IFS=$old_ifs
+    fi
+    rm -f "$ids" "$slugs"
+
+    if [ -f TODO.md ] && grep -Eq 'tickets/[^][ )]+\.md|tickets/.*\.review\.md' TODO.md; then
+        doctor_error "TODO.md still references legacy tickets/*.md"
+    fi
+    for f in tickets/*.md tickets/*.review.md; do
+        [ -e "$f" ] || continue
+        doctor_error "legacy ticket file remains: $f"
+    done
+
+    if [ "$DOCTOR_ERRORS" -eq 0 ]; then
+        printf 'doctor: ok\n'
+        return 0
+    fi
+    printf 'doctor: %s error(s)\n' "$DOCTOR_ERRORS" >&2
+    return 1
+}
+
+main() {
+    cmd=${1:-help}
+    case "$cmd" in
+        help|--help|-h) usage ;;
+        list) shift; cmd_list "$@" ;;
+        show) shift; cmd_show "$@" ;;
+        create) shift; cmd_create "$@" ;;
+        comment) shift; cmd_comment "$@" ;;
+        review) shift; cmd_review "$@" ;;
+        status) shift; cmd_status "$@" ;;
+        close) shift; cmd_close "$@" ;;
+        doctor) shift; [ "$#" -eq 0 ] || die "doctor takes no arguments"; cmd_doctor ;;
+        *) usage >&2; die "unknown command: $cmd" ;;
+    esac
+}
+
+main "$@"
diff --git a/work-items/README.md b/work-items/README.md
new file mode 100644
index 00000000..c67b7562
--- /dev/null
+++ b/work-items/README.md
@@ -0,0 +1,96 @@
+# Work Items backend
+
+`work-items/` is the canonical file backend for repository work after the migration from `TODO.md` and `tickets/*.md`.
+
+## Layout
+
+```text
+work-items/
+  README.md
+  open/
+    <id>/
+      item.md
+      thread.md
+      artifacts/
+  pending/
+    <id>/
+      item.md
+      thread.md
+      artifacts/
+  closed/
+    <id>/
+      item.md
+      thread.md
+      resolution.md
+      artifacts/
+```
+
+`<id>` is timestamp based: `YYYYMMDD-HHMMSS-<slug>`. There is no central sequence file.
+
+## `item.md` schema
+
+`item.md` is Markdown with YAML-like frontmatter. The MVP parser intentionally supports only simple `key: value` lines.
+
+Required fields:
+
+```yaml
+---
+id: 20260527-000001-example
+slug: example
+title: Human-readable title
+status: open
+kind: feature
+priority: P2
+labels: [maintainer, workflow]
+created_at: 2026-05-27T00:00:01Z
+updated_at: 2026-05-27T00:00:01Z
+assignee: null
+legacy_ticket: tickets/example.md
+---
+```
+
+`status` must match the containing directory (`open`, `pending`, or `closed`). `legacy_ticket` records the migrated source path when one existed; use `null` for items created from a TODO-only entry or new work.
+
+## `thread.md` schema
+
+`thread.md` is an append-only Markdown event log. `tickets.sh comment`, `tickets.sh review`, and `tickets.sh close` append an HTML-comment event header, a Markdown heading, the event body, and a `---` separator.
+
+Example:
+
+```md
+<!-- event: review author: orchestrator at: 2026-05-27T12:00:00Z status: request_changes -->
+
+## Review: request changes
+
+Review notes.
+
+---
+```
+
+Review state belongs in `thread.md`; new `tickets/*.review.md` files should not be created.
+
+## Commands
+
+Use `../tickets.sh --help` from this repository root for the command reference. The script performs file operations only; it does not run `git add` or `git commit`.
+
+Common commands:
+
+```sh
+./tickets.sh list --status all
+./tickets.sh show <id-or-slug>
+./tickets.sh create --title "Title" --slug title
+./tickets.sh comment <id-or-slug> --role plan --file notes.md
+./tickets.sh review <id-or-slug> --approve --file review.md
+./tickets.sh close <id-or-slug> --resolution "Done"
+./tickets.sh doctor
+```
+
+## Migration policy
+
+The migration moved unfinished `TODO.md` entries and `tickets/*.md` bodies into `work-items/open/*/item.md`. Existing review files, when present, must be represented as `review` events in `thread.md`. After migration:
+
+- `work-items/` is the source of truth.
+- `TODO.md` is only a legacy/generated-view notice and must not carry open ticket state.
+- `tickets/*.md` and `tickets/*.review.md` must not remain as canonical unfinished items.
+- Closed items are moved to `work-items/closed/` instead of being deleted.
+- `./tickets.sh doctor` checks schema, status placement, duplicate IDs/slugs, and leftover legacy ticket files.
diff --git a/work-items/open/20260527-000001-auto-maintain-workflow/artifacts/.gitkeep b/work-items/open/20260527-000001-auto-maintain-workflow/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/auto-maintain-workflow.md b/work-items/open/20260527-000001-auto-maintain-workflow/item.md
similarity index 91%
rename from tickets/auto-maintain-workflow.md
rename to work-items/open/20260527-000001-auto-maintain-workflow/item.md
index 0b4d4a24..3dc5ce86 100644
--- a/tickets/auto-maintain-workflow.md
+++ b/work-items/open/20260527-000001-auto-maintain-workflow/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000001-auto-maintain-workflow
+slug: auto-maintain-workflow
+title: 半自動開発運用 Workflow
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:01Z
+updated_at: 2026-05-27T00:00:01Z
+assignee: null
+legacy_ticket: tickets/auto-maintain-workflow.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/auto-maintain-workflow.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # 半自動開発運用 Workflow
 
 ## 背景
diff --git a/work-items/open/20260527-000001-auto-maintain-workflow/thread.md b/work-items/open/20260527-000001-auto-maintain-workflow/thread.md
new file mode 100644
index 00000000..fe35c9a7
--- /dev/null
+++ b/work-items/open/20260527-000001-auto-maintain-workflow/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:01Z -->
+
+## Migrated
+
+Migrated from tickets/auto-maintain-workflow.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000002-e2e-harness/artifacts/.gitkeep b/work-items/open/20260527-000002-e2e-harness/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/e2e-harness.md b/work-items/open/20260527-000002-e2e-harness/item.md
similarity index 94%
rename from tickets/e2e-harness.md
rename to work-items/open/20260527-000002-e2e-harness/item.md
index 4206396d..edea4554 100644
--- a/tickets/e2e-harness.md
+++ b/work-items/open/20260527-000002-e2e-harness/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000002-e2e-harness
+slug: e2e-harness
+title: E2E テストハーネス
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:02Z
+updated_at: 2026-05-27T00:00:02Z
+assignee: null
+legacy_ticket: tickets/e2e-harness.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/e2e-harness.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # E2E テストハーネス
 
 ## 背景
diff --git a/work-items/open/20260527-000002-e2e-harness/thread.md b/work-items/open/20260527-000002-e2e-harness/thread.md
new file mode 100644
index 00000000..19c7d489
--- /dev/null
+++ b/work-items/open/20260527-000002-e2e-harness/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:02Z -->
+
+## Migrated
+
+Migrated from tickets/e2e-harness.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000003-internal-worker-workflow/artifacts/.gitkeep b/work-items/open/20260527-000003-internal-worker-workflow/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/internal-worker-workflow.md b/work-items/open/20260527-000003-internal-worker-workflow/item.md
similarity index 91%
rename from tickets/internal-worker-workflow.md
rename to work-items/open/20260527-000003-internal-worker-workflow/item.md
index a4986048..9493d3b9 100644
--- a/tickets/internal-worker-workflow.md
+++ b/work-items/open/20260527-000003-internal-worker-workflow/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000003-internal-worker-workflow
+slug: internal-worker-workflow
+title: 内部 Worker / 内部 Pod の Workflow 化
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:03Z
+updated_at: 2026-05-27T00:00:03Z
+assignee: null
+legacy_ticket: tickets/internal-worker-workflow.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/internal-worker-workflow.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # 内部 Worker / 内部 Pod の Workflow 化
 
 ## 背景
diff --git a/work-items/open/20260527-000003-internal-worker-workflow/thread.md b/work-items/open/20260527-000003-internal-worker-workflow/thread.md
new file mode 100644
index 00000000..bb9ff4a8
--- /dev/null
+++ b/work-items/open/20260527-000003-internal-worker-workflow/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:03Z -->
+
+## Migrated
+
+Migrated from tickets/internal-worker-workflow.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000004-manual-turn-rollback/artifacts/.gitkeep b/work-items/open/20260527-000004-manual-turn-rollback/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/manual-turn-rollback.md b/work-items/open/20260527-000004-manual-turn-rollback/item.md
similarity index 86%
rename from tickets/manual-turn-rollback.md
rename to work-items/open/20260527-000004-manual-turn-rollback/item.md
index 34e8b8b4..f9ed213f 100644
--- a/tickets/manual-turn-rollback.md
+++ b/work-items/open/20260527-000004-manual-turn-rollback/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000004-manual-turn-rollback
+slug: manual-turn-rollback
+title: Pod/TUI: 手動 rollback 導線
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:04Z
+updated_at: 2026-05-27T00:00:04Z
+assignee: null
+legacy_ticket: tickets/manual-turn-rollback.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/manual-turn-rollback.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # Pod/TUI: 手動 rollback 導線
 
 ## 背景
diff --git a/work-items/open/20260527-000004-manual-turn-rollback/thread.md b/work-items/open/20260527-000004-manual-turn-rollback/thread.md
new file mode 100644
index 00000000..722bfdb6
--- /dev/null
+++ b/work-items/open/20260527-000004-manual-turn-rollback/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:04Z -->
+
+## Migrated
+
+Migrated from tickets/manual-turn-rollback.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000005-memory-tool-guidance-prompt/artifacts/.gitkeep b/work-items/open/20260527-000005-memory-tool-guidance-prompt/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/memory-tool-guidance-prompt.md b/work-items/open/20260527-000005-memory-tool-guidance-prompt/item.md
similarity index 89%
rename from tickets/memory-tool-guidance-prompt.md
rename to work-items/open/20260527-000005-memory-tool-guidance-prompt/item.md
index ed24d55d..f4495ffa 100644
--- a/tickets/memory-tool-guidance-prompt.md
+++ b/work-items/open/20260527-000005-memory-tool-guidance-prompt/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000005-memory-tool-guidance-prompt
+slug: memory-tool-guidance-prompt
+title: プロンプト: memory / knowledge tool 利用タイミングのガイダンス
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:05Z
+updated_at: 2026-05-27T00:00:05Z
+assignee: null
+legacy_ticket: tickets/memory-tool-guidance-prompt.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/memory-tool-guidance-prompt.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # プロンプト: memory / knowledge tool 利用タイミングのガイダンス
 
 ## 背景
diff --git a/work-items/open/20260527-000005-memory-tool-guidance-prompt/thread.md b/work-items/open/20260527-000005-memory-tool-guidance-prompt/thread.md
new file mode 100644
index 00000000..2af43981
--- /dev/null
+++ b/work-items/open/20260527-000005-memory-tool-guidance-prompt/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:05Z -->
+
+## Migrated
+
+Migrated from tickets/memory-tool-guidance-prompt.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000006-permission-default-policy/artifacts/.gitkeep b/work-items/open/20260527-000006-permission-default-policy/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/permission-default-policy.md b/work-items/open/20260527-000006-permission-default-policy/item.md
similarity index 83%
rename from tickets/permission-default-policy.md
rename to work-items/open/20260527-000006-permission-default-policy/item.md
index d46edfee..e80f386f 100644
--- a/tickets/permission-default-policy.md
+++ b/work-items/open/20260527-000006-permission-default-policy/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000006-permission-default-policy
+slug: permission-default-policy
+title: Permission: allow-all 既定 policy への整理
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:06Z
+updated_at: 2026-05-27T00:00:06Z
+assignee: null
+legacy_ticket: tickets/permission-default-policy.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/permission-default-policy.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # Permission: allow-all 既定 policy への整理
 
 ## 背景
diff --git a/work-items/open/20260527-000006-permission-default-policy/thread.md b/work-items/open/20260527-000006-permission-default-policy/thread.md
new file mode 100644
index 00000000..5b159edf
--- /dev/null
+++ b/work-items/open/20260527-000006-permission-default-policy/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:06Z -->
+
+## Migrated
+
+Migrated from tickets/permission-default-policy.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000007-pod-inbound-pod-event-dedup/artifacts/.gitkeep b/work-items/open/20260527-000007-pod-inbound-pod-event-dedup/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/pod-inbound-pod-event-dedup.md b/work-items/open/20260527-000007-pod-inbound-pod-event-dedup/item.md
similarity index 87%
rename from tickets/pod-inbound-pod-event-dedup.md
rename to work-items/open/20260527-000007-pod-inbound-pod-event-dedup/item.md
index fe066c26..c37ccd62 100644
--- a/tickets/pod-inbound-pod-event-dedup.md
+++ b/work-items/open/20260527-000007-pod-inbound-pod-event-dedup/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000007-pod-inbound-pod-event-dedup
+slug: pod-inbound-pod-event-dedup
+title: Inbound PodEvent ハンドリングの重複を統合する
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:07Z
+updated_at: 2026-05-27T00:00:07Z
+assignee: null
+legacy_ticket: tickets/pod-inbound-pod-event-dedup.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/pod-inbound-pod-event-dedup.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # Inbound PodEvent ハンドリングの重複を統合する
 
 ## 背景
diff --git a/work-items/open/20260527-000007-pod-inbound-pod-event-dedup/thread.md b/work-items/open/20260527-000007-pod-inbound-pod-event-dedup/thread.md
new file mode 100644
index 00000000..e21e2266
--- /dev/null
+++ b/work-items/open/20260527-000007-pod-inbound-pod-event-dedup/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:07Z -->
+
+## Migrated
+
+Migrated from tickets/pod-inbound-pod-event-dedup.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000008-pod-scope-persistence-authority/artifacts/.gitkeep b/work-items/open/20260527-000008-pod-scope-persistence-authority/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/pod-scope-persistence-authority.md b/work-items/open/20260527-000008-pod-scope-persistence-authority/item.md
similarity index 89%
rename from tickets/pod-scope-persistence-authority.md
rename to work-items/open/20260527-000008-pod-scope-persistence-authority/item.md
index 4ee13a68..f18e5130 100644
--- a/tickets/pod-scope-persistence-authority.md
+++ b/work-items/open/20260527-000008-pod-scope-persistence-authority/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000008-pod-scope-persistence-authority
+slug: pod-scope-persistence-authority
+title: Pod: scope 永続化 authority の整理
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:08Z
+updated_at: 2026-05-27T00:00:08Z
+assignee: null
+legacy_ticket: tickets/pod-scope-persistence-authority.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/pod-scope-persistence-authority.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # Pod: scope 永続化 authority の整理
 
 ## 背景
diff --git a/work-items/open/20260527-000008-pod-scope-persistence-authority/thread.md b/work-items/open/20260527-000008-pod-scope-persistence-authority/thread.md
new file mode 100644
index 00000000..6e9d829d
--- /dev/null
+++ b/work-items/open/20260527-000008-pod-scope-persistence-authority/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:08Z -->
+
+## Migrated
+
+Migrated from tickets/pod-scope-persistence-authority.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000009-pod-session-fork/artifacts/.gitkeep b/work-items/open/20260527-000009-pod-session-fork/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/pod-session-fork.md b/work-items/open/20260527-000009-pod-session-fork/item.md
similarity index 89%
rename from tickets/pod-session-fork.md
rename to work-items/open/20260527-000009-pod-session-fork/item.md
index 0021b9af..1086b8cd 100644
--- a/tickets/pod-session-fork.md
+++ b/work-items/open/20260527-000009-pod-session-fork/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000009-pod-session-fork
+slug: pod-session-fork
+title: Pod: 任意ターンからの Fork（複数ターン巻き戻し）
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:09Z
+updated_at: 2026-05-27T00:00:09Z
+assignee: null
+legacy_ticket: tickets/pod-session-fork.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/pod-session-fork.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # Pod: 任意ターンからの Fork（複数ターン巻き戻し）
 
 ## 背景
diff --git a/work-items/open/20260527-000009-pod-session-fork/thread.md b/work-items/open/20260527-000009-pod-session-fork/thread.md
new file mode 100644
index 00000000..d067f59f
--- /dev/null
+++ b/work-items/open/20260527-000009-pod-session-fork/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:09Z -->
+
+## Migrated
+
+Migrated from tickets/pod-session-fork.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000010-prompt-eval-metrics/artifacts/.gitkeep b/work-items/open/20260527-000010-prompt-eval-metrics/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/prompt-eval-metrics.md b/work-items/open/20260527-000010-prompt-eval-metrics/item.md
similarity index 93%
rename from tickets/prompt-eval-metrics.md
rename to work-items/open/20260527-000010-prompt-eval-metrics/item.md
index f63d0de9..12471677 100644
--- a/tickets/prompt-eval-metrics.md
+++ b/work-items/open/20260527-000010-prompt-eval-metrics/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000010-prompt-eval-metrics
+slug: prompt-eval-metrics
+title: Prompt / Workflow 評価メトリクスと改善 Offer
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:10Z
+updated_at: 2026-05-27T00:00:10Z
+assignee: null
+legacy_ticket: tickets/prompt-eval-metrics.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/prompt-eval-metrics.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # Prompt / Workflow 評価メトリクスと改善 Offer
 
 ## 背景
diff --git a/work-items/open/20260527-000010-prompt-eval-metrics/thread.md b/work-items/open/20260527-000010-prompt-eval-metrics/thread.md
new file mode 100644
index 00000000..63b54caf
--- /dev/null
+++ b/work-items/open/20260527-000010-prompt-eval-metrics/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:10Z -->
+
+## Migrated
+
+Migrated from tickets/prompt-eval-metrics.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000011-session-todo-reminder/artifacts/.gitkeep b/work-items/open/20260527-000011-session-todo-reminder/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/session-todo-reminder.md b/work-items/open/20260527-000011-session-todo-reminder/item.md
similarity index 92%
rename from tickets/session-todo-reminder.md
rename to work-items/open/20260527-000011-session-todo-reminder/item.md
index ff4ca12a..c730659b 100644
--- a/tickets/session-todo-reminder.md
+++ b/work-items/open/20260527-000011-session-todo-reminder/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000011-session-todo-reminder
+slug: session-todo-reminder
+title: セッション内 Task ツールの注意機構
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:11Z
+updated_at: 2026-05-27T00:00:11Z
+assignee: null
+legacy_ticket: tickets/session-todo-reminder.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/session-todo-reminder.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # セッション内 Task ツールの注意機構
 
 ## 背景
diff --git a/work-items/open/20260527-000011-session-todo-reminder/thread.md b/work-items/open/20260527-000011-session-todo-reminder/thread.md
new file mode 100644
index 00000000..30b52b26
--- /dev/null
+++ b/work-items/open/20260527-000011-session-todo-reminder/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:11Z -->
+
+## Migrated
+
+Migrated from tickets/session-todo-reminder.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000012-spawnpod-initial-run-confirmation/artifacts/.gitkeep b/work-items/open/20260527-000012-spawnpod-initial-run-confirmation/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/spawnpod-initial-run-confirmation.md b/work-items/open/20260527-000012-spawnpod-initial-run-confirmation/item.md
similarity index 87%
rename from tickets/spawnpod-initial-run-confirmation.md
rename to work-items/open/20260527-000012-spawnpod-initial-run-confirmation/item.md
index d268c14b..a4262067 100644
--- a/tickets/spawnpod-initial-run-confirmation.md
+++ b/work-items/open/20260527-000012-spawnpod-initial-run-confirmation/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000012-spawnpod-initial-run-confirmation
+slug: spawnpod-initial-run-confirmation
+title: SpawnPod: initial Run delivery confirmation
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:12Z
+updated_at: 2026-05-27T00:00:12Z
+assignee: null
+legacy_ticket: tickets/spawnpod-initial-run-confirmation.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/spawnpod-initial-run-confirmation.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # SpawnPod: initial Run delivery confirmation
 
 ## 背景
diff --git a/work-items/open/20260527-000012-spawnpod-initial-run-confirmation/thread.md b/work-items/open/20260527-000012-spawnpod-initial-run-confirmation/thread.md
new file mode 100644
index 00000000..8870382b
--- /dev/null
+++ b/work-items/open/20260527-000012-spawnpod-initial-run-confirmation/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:12Z -->
+
+## Migrated
+
+Migrated from tickets/spawnpod-initial-run-confirmation.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/artifacts/.gitkeep b/work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/tickets-sh-workitem-thread-mvp.md b/work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/item.md
similarity index 94%
rename from tickets/tickets-sh-workitem-thread-mvp.md
rename to work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/item.md
index 038039f0..13247fa3 100644
--- a/tickets/tickets-sh-workitem-thread-mvp.md
+++ b/work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000013-tickets-sh-workitem-thread-mvp
+slug: tickets-sh-workitem-thread-mvp
+title: Ticket 管理: tickets.sh による WorkItem / Thread MVP
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:13Z
+updated_at: 2026-05-27T00:00:13Z
+assignee: null
+legacy_ticket: tickets/tickets-sh-workitem-thread-mvp.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/tickets-sh-workitem-thread-mvp.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # Ticket 管理: tickets.sh による WorkItem / Thread MVP
 
 ## 背景
diff --git a/work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/thread.md b/work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/thread.md
new file mode 100644
index 00000000..b26349be
--- /dev/null
+++ b/work-items/open/20260527-000013-tickets-sh-workitem-thread-mvp/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:13Z -->
+
+## Migrated
+
+Migrated from tickets/tickets-sh-workitem-thread-mvp.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000014-tui-actionbar-transient-notice-api/artifacts/.gitkeep b/work-items/open/20260527-000014-tui-actionbar-transient-notice-api/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/tui-actionbar-transient-notice-api.md b/work-items/open/20260527-000014-tui-actionbar-transient-notice-api/item.md
similarity index 85%
rename from tickets/tui-actionbar-transient-notice-api.md
rename to work-items/open/20260527-000014-tui-actionbar-transient-notice-api/item.md
index ba22c8ba..8edbe478 100644
--- a/tickets/tui-actionbar-transient-notice-api.md
+++ b/work-items/open/20260527-000014-tui-actionbar-transient-notice-api/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000014-tui-actionbar-transient-notice-api
+slug: tui-actionbar-transient-notice-api
+title: TUI: actionbar transient notice API
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:14Z
+updated_at: 2026-05-27T00:00:14Z
+assignee: null
+legacy_ticket: tickets/tui-actionbar-transient-notice-api.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/tui-actionbar-transient-notice-api.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # TUI: actionbar transient notice API
 
 ## 背景
diff --git a/work-items/open/20260527-000014-tui-actionbar-transient-notice-api/thread.md b/work-items/open/20260527-000014-tui-actionbar-transient-notice-api/thread.md
new file mode 100644
index 00000000..00846369
--- /dev/null
+++ b/work-items/open/20260527-000014-tui-actionbar-transient-notice-api/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:14Z -->
+
+## Migrated
+
+Migrated from tickets/tui-actionbar-transient-notice-api.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000015-tui-navigation-mode-design/artifacts/.gitkeep b/work-items/open/20260527-000015-tui-navigation-mode-design/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/tui-navigation-mode-design.md b/work-items/open/20260527-000015-tui-navigation-mode-design/item.md
similarity index 85%
rename from tickets/tui-navigation-mode-design.md
rename to work-items/open/20260527-000015-tui-navigation-mode-design/item.md
index a0d17b7d..c0a6999b 100644
--- a/tickets/tui-navigation-mode-design.md
+++ b/work-items/open/20260527-000015-tui-navigation-mode-design/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000015-tui-navigation-mode-design
+slug: tui-navigation-mode-design
+title: TUI: navigation mode / block focus の設計
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:15Z
+updated_at: 2026-05-27T00:00:15Z
+assignee: null
+legacy_ticket: tickets/tui-navigation-mode-design.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/tui-navigation-mode-design.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # TUI: navigation mode / block focus の設計
 
 ## 背景
diff --git a/work-items/open/20260527-000015-tui-navigation-mode-design/thread.md b/work-items/open/20260527-000015-tui-navigation-mode-design/thread.md
new file mode 100644
index 00000000..c98d4d88
--- /dev/null
+++ b/work-items/open/20260527-000015-tui-navigation-mode-design/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:15Z -->
+
+## Migrated
+
+Migrated from tickets/tui-navigation-mode-design.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000016-tui-picker-live-pending-pods/artifacts/.gitkeep b/work-items/open/20260527-000016-tui-picker-live-pending-pods/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/tui-picker-live-pending-pods.md b/work-items/open/20260527-000016-tui-picker-live-pending-pods/item.md
similarity index 86%
rename from tickets/tui-picker-live-pending-pods.md
rename to work-items/open/20260527-000016-tui-picker-live-pending-pods/item.md
index a3dc75fa..94cce421 100644
--- a/tickets/tui-picker-live-pending-pods.md
+++ b/work-items/open/20260527-000016-tui-picker-live-pending-pods/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000016-tui-picker-live-pending-pods
+slug: tui-picker-live-pending-pods
+title: TUI picker: live pending Pod の表示優先と状態補完
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:16Z
+updated_at: 2026-05-27T00:00:16Z
+assignee: null
+legacy_ticket: tickets/tui-picker-live-pending-pods.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/tui-picker-live-pending-pods.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # TUI picker: live pending Pod の表示優先と状態補完
 
 ## 背景
diff --git a/work-items/open/20260527-000016-tui-picker-live-pending-pods/thread.md b/work-items/open/20260527-000016-tui-picker-live-pending-pods/thread.md
new file mode 100644
index 00000000..3151c830
--- /dev/null
+++ b/work-items/open/20260527-000016-tui-picker-live-pending-pods/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:16Z -->
+
+## Migrated
+
+Migrated from tickets/tui-picker-live-pending-pods.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000017-tui-spawned-pod-panel/artifacts/.gitkeep b/work-items/open/20260527-000017-tui-spawned-pod-panel/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/tui-spawned-pod-panel.md b/work-items/open/20260527-000017-tui-spawned-pod-panel/item.md
similarity index 87%
rename from tickets/tui-spawned-pod-panel.md
rename to work-items/open/20260527-000017-tui-spawned-pod-panel/item.md
index f221c697..0aceae0a 100644
--- a/tickets/tui-spawned-pod-panel.md
+++ b/work-items/open/20260527-000017-tui-spawned-pod-panel/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000017-tui-spawned-pod-panel
+slug: tui-spawned-pod-panel
+title: TUI: spawned child Pod の一覧と一時 attach
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:17Z
+updated_at: 2026-05-27T00:00:17Z
+assignee: null
+legacy_ticket: tickets/tui-spawned-pod-panel.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/tui-spawned-pod-panel.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # TUI: spawned child Pod の一覧と一時 attach
 
 ## 背景
diff --git a/work-items/open/20260527-000017-tui-spawned-pod-panel/thread.md b/work-items/open/20260527-000017-tui-spawned-pod-panel/thread.md
new file mode 100644
index 00000000..da52ca45
--- /dev/null
+++ b/work-items/open/20260527-000017-tui-spawned-pod-panel/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:17Z -->
+
+## Migrated
+
+Migrated from tickets/tui-spawned-pod-panel.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000018-tui-user-model-setup/artifacts/.gitkeep b/work-items/open/20260527-000018-tui-user-model-setup/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tickets/tui-user-model-setup.md b/work-items/open/20260527-000018-tui-user-model-setup/item.md
similarity index 91%
rename from tickets/tui-user-model-setup.md
rename to work-items/open/20260527-000018-tui-user-model-setup/item.md
index a96f7358..391085b7 100644
--- a/tickets/tui-user-model-setup.md
+++ b/work-items/open/20260527-000018-tui-user-model-setup/item.md
@@ -1,3 +1,22 @@
+---
+id: 20260527-000018-tui-user-model-setup
+slug: tui-user-model-setup
+title: TUI: ユーザーマニフェストのモデル設定 wizard
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:18Z
+updated_at: 2026-05-27T00:00:18Z
+assignee: null
+legacy_ticket: tickets/tui-user-model-setup.md
+---
+
+## Migration reference
+
+- legacy_ticket: tickets/tui-user-model-setup.md
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
 # TUI: ユーザーマニフェストのモデル設定 wizard
 
 ## 背景
diff --git a/work-items/open/20260527-000018-tui-user-model-setup/thread.md b/work-items/open/20260527-000018-tui-user-model-setup/thread.md
new file mode 100644
index 00000000..8a767303
--- /dev/null
+++ b/work-items/open/20260527-000018-tui-user-model-setup/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:18Z -->
+
+## Migrated
+
+Migrated from tickets/tui-user-model-setup.md. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000019-workspace-memory-lint-cli/artifacts/.gitkeep b/work-items/open/20260527-000019-workspace-memory-lint-cli/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/work-items/open/20260527-000019-workspace-memory-lint-cli/item.md b/work-items/open/20260527-000019-workspace-memory-lint-cli/item.md
new file mode 100644
index 00000000..a526a792
--- /dev/null
+++ b/work-items/open/20260527-000019-workspace-memory-lint-cli/item.md
@@ -0,0 +1,28 @@
+---
+id: 20260527-000019-workspace-memory-lint-cli
+slug: workspace-memory-lint-cli
+title: ワークスペースのメモリーをLintするヘッドレスCLI
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:19Z
+updated_at: 2026-05-27T00:00:19Z
+assignee: null
+legacy_ticket: null
+---
+
+## Migration reference
+
+- legacy_ticket: null
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
+# ワークスペースのメモリーをLintするヘッドレスCLI
+
+## Background
+
+This work item was migrated from an unfinished TODO.md entry that did not have a dedicated legacy ticket file.
+
+## Acceptance criteria
+
+- Define the concrete requirements before implementation.
diff --git a/work-items/open/20260527-000019-workspace-memory-lint-cli/thread.md b/work-items/open/20260527-000019-workspace-memory-lint-cli/thread.md
new file mode 100644
index 00000000..022593fd
--- /dev/null
+++ b/work-items/open/20260527-000019-workspace-memory-lint-cli/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:19Z -->
+
+## Migrated
+
+Migrated from TODO.md entry without a legacy ticket file. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000020-system-reminder-injection-generalization/artifacts/.gitkeep b/work-items/open/20260527-000020-system-reminder-injection-generalization/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/work-items/open/20260527-000020-system-reminder-injection-generalization/item.md b/work-items/open/20260527-000020-system-reminder-injection-generalization/item.md
new file mode 100644
index 00000000..9f6e84cf
--- /dev/null
+++ b/work-items/open/20260527-000020-system-reminder-injection-generalization/item.md
@@ -0,0 +1,28 @@
+---
+id: 20260527-000020-system-reminder-injection-generalization
+slug: system-reminder-injection-generalization
+title: system-reminder 注入機構の汎用化（2件目の利用者が出た時に検討。タグ形式 `<system-reminder>...</system-reminder>` の規約は session-todo-reminder で先行確立。注入された Item は worker.history に append する方針）
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:20Z
+updated_at: 2026-05-27T00:00:20Z
+assignee: null
+legacy_ticket: null
+---
+
+## Migration reference
+
+- legacy_ticket: null
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
+# system-reminder 注入機構の汎用化（2件目の利用者が出た時に検討。タグ形式 `<system-reminder>...</system-reminder>` の規約は session-todo-reminder で先行確立。注入された Item は worker.history に append する方針）
+
+## Background
+
+This work item was migrated from an unfinished TODO.md entry that did not have a dedicated legacy ticket file.
+
+## Acceptance criteria
+
+- Define the concrete requirements before implementation.
diff --git a/work-items/open/20260527-000020-system-reminder-injection-generalization/thread.md b/work-items/open/20260527-000020-system-reminder-injection-generalization/thread.md
new file mode 100644
index 00000000..b93af586
--- /dev/null
+++ b/work-items/open/20260527-000020-system-reminder-injection-generalization/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:20Z -->
+
+## Migrated
+
+Migrated from TODO.md entry without a legacy ticket file. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000021-bash-tool-editing-guidance/artifacts/.gitkeep b/work-items/open/20260527-000021-bash-tool-editing-guidance/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/work-items/open/20260527-000021-bash-tool-editing-guidance/item.md b/work-items/open/20260527-000021-bash-tool-editing-guidance/item.md
new file mode 100644
index 00000000..e48fb42d
--- /dev/null
+++ b/work-items/open/20260527-000021-bash-tool-editing-guidance/item.md
@@ -0,0 +1,28 @@
+---
+id: 20260527-000021-bash-tool-editing-guidance
+slug: bash-tool-editing-guidance
+title: Bashツールがファイル編集に常用されている問題をdesciptionで抑制
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:21Z
+updated_at: 2026-05-27T00:00:21Z
+assignee: null
+legacy_ticket: null
+---
+
+## Migration reference
+
+- legacy_ticket: null
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
+# Bashツールがファイル編集に常用されている問題をdesciptionで抑制
+
+## Background
+
+This work item was migrated from an unfinished TODO.md entry that did not have a dedicated legacy ticket file.
+
+## Acceptance criteria
+
+- Define the concrete requirements before implementation.
diff --git a/work-items/open/20260527-000021-bash-tool-editing-guidance/thread.md b/work-items/open/20260527-000021-bash-tool-editing-guidance/thread.md
new file mode 100644
index 00000000..f43b546f
--- /dev/null
+++ b/work-items/open/20260527-000021-bash-tool-editing-guidance/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:21Z -->
+
+## Migrated
+
+Migrated from TODO.md entry without a legacy ticket file. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000022-manifest-profiles/artifacts/.gitkeep b/work-items/open/20260527-000022-manifest-profiles/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/work-items/open/20260527-000022-manifest-profiles/item.md b/work-items/open/20260527-000022-manifest-profiles/item.md
new file mode 100644
index 00000000..0b54960e
--- /dev/null
+++ b/work-items/open/20260527-000022-manifest-profiles/item.md
@@ -0,0 +1,28 @@
+---
+id: 20260527-000022-manifest-profiles
+slug: manifest-profiles
+title: 事前定義したManifestをProfile的に扱い、Orchestrator/Coder/Researcherで別々のモデル/設定を使わせる運用ができるようにする
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:22Z
+updated_at: 2026-05-27T00:00:22Z
+assignee: null
+legacy_ticket: null
+---
+
+## Migration reference
+
+- legacy_ticket: null
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
+# 事前定義したManifestをProfile的に扱い、Orchestrator/Coder/Researcherで別々のモデル/設定を使わせる運用ができるようにする
+
+## Background
+
+This work item was migrated from an unfinished TODO.md entry that did not have a dedicated legacy ticket file.
+
+## Acceptance criteria
+
+- Define the concrete requirements before implementation.
diff --git a/work-items/open/20260527-000022-manifest-profiles/thread.md b/work-items/open/20260527-000022-manifest-profiles/thread.md
new file mode 100644
index 00000000..52be7a34
--- /dev/null
+++ b/work-items/open/20260527-000022-manifest-profiles/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:22Z -->
+
+## Migrated
+
+Migrated from TODO.md entry without a legacy ticket file. No legacy review file was present at migration time.
+
+---
diff --git a/work-items/open/20260527-000023-multi-pod-view-ui/artifacts/.gitkeep b/work-items/open/20260527-000023-multi-pod-view-ui/artifacts/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/work-items/open/20260527-000023-multi-pod-view-ui/item.md b/work-items/open/20260527-000023-multi-pod-view-ui/item.md
new file mode 100644
index 00000000..1cdcbb5b
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+++ b/work-items/open/20260527-000023-multi-pod-view-ui/item.md
@@ -0,0 +1,28 @@
+---
+id: 20260527-000023-multi-pod-view-ui
+slug: multi-pod-view-ui
+title: 複数のPodのViewを行き来できるUI
+status: open
+kind: task
+priority: P2
+labels: [migrated]
+created_at: 2026-05-27T00:00:23Z
+updated_at: 2026-05-27T00:00:23Z
+assignee: null
+legacy_ticket: null
+---
+
+## Migration reference
+
+- legacy_ticket: null
+- migrated_from: TODO.md / tickets directory migration on 2026-05-27
+
+# 複数のPodのViewを行き来できるUI
+
+## Background
+
+This work item was migrated from an unfinished TODO.md entry that did not have a dedicated legacy ticket file.
+
+## Acceptance criteria
+
+- Define the concrete requirements before implementation.
diff --git a/work-items/open/20260527-000023-multi-pod-view-ui/thread.md b/work-items/open/20260527-000023-multi-pod-view-ui/thread.md
new file mode 100644
index 00000000..ceb2c1b9
--- /dev/null
+++ b/work-items/open/20260527-000023-multi-pod-view-ui/thread.md
@@ -0,0 +1,7 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:23Z -->
+
+## Migrated
+
+Migrated from TODO.md entry without a legacy ticket file. No legacy review file was present at migration time.
+
+---