docs(prd-0011): drop the migration command requirement

claude-bottle has a single primary user today; an automated
JSON → MD migration tool is overkill. Hand-rewriting one file
is the migration cost. The resolver still dies with a pointer
at the README's manifest section if a stale claude-bottle.json
is found alongside no .claude-bottle/ directory, so the breaking
change isn't silent.

Drops: SC #6 (migration tool), the "Migration command" In Scope
sub-bullet, the migrate_manifest.py / cli wiring entries from
Existing code touched, the tests/integration/test_migrate_manifest.py
entry from Tests, the destructive-vs-additive open question.
Renumbers the remaining success criteria 6, 7 (formerly 7, 8).
Backward-compat section rewritten around hand-rewrite.

docs/prds/0011-per-file-md-manifest.md

@@ -87,21 +87,13 @@ Each test runs against a temporary `$HOME` and a temporary `$CWD`:
    parser test. Frontmatter parsing is hand-rolled against the
    declared YAML subset.
 
-6. **Migration tool converts existing JSON to per-file MD.**
-   `./cli.py migrate-manifest` reads `$HOME/claude-bottle.json`
-   (and `$CWD/claude-bottle.json` if present), writes a tree of
-   per-file MD docs to the new locations, then prints what was
-   moved. Idempotent: rerunning is a no-op when the new layout
-   already exists. Does not delete the old JSON files
-   automatically (user-driven cleanup).
-
-7. **Existing tests pass against the new layout.** Tests today
+6. **Existing tests pass against the new layout.** Tests today
    build manifests via JSON literals against `Manifest.from_json_obj`.
    That entry point keeps working for tests (used to construct
    manifests programmatically); production resolution flows
    through the new directory-globbing loader.
 
-8. **Agent files double as Claude Code subagent files.** The
+7. **Agent files double as Claude Code subagent files.** The
    `name`, `description`, `model`, `color`, and `memory` fields
    from Claude Code's existing subagent spec are accepted in
    our frontmatter alongside our own fields. Copying an agent
@@ -119,11 +111,11 @@ Each test runs against a temporary `$HOME` and a temporary `$CWD`:
   pointer at the spec. We are not building a YAML library.
 
 - **Compatibility with the old JSON layout at runtime.** The
-  resolver no longer reads `claude-bottle.json` files. The
-  migration tool is the bridge; after migration the JSON file
-  is stale (and the user removes it). This is a breaking
-  change for v1 users; the migration cost is one command + a
-  manual delete.
+  resolver no longer reads `claude-bottle.json` files. This is
+  a breaking change; existing users hand-rewrite their JSON
+  into the new per-file layout (claude-bottle has a single
+  primary user today, so the migration is one person rewriting
+  one file). Documented as part of the README rewrite.
 
 - **`$HOME/.claude/agents/` integration on the input side.** We
   don't read agent files out of Claude Code's directory. Our
@@ -208,25 +200,6 @@ Each test runs against a temporary `$HOME` and a temporary `$CWD`:
   5. Warn if `$CWD/.claude-bottle/bottles/` exists with files.
   6. Return Manifest dataclass — same shape as today.
 
-- **Migration command.** `./cli.py migrate-manifest`:
-  - Reads `$HOME/claude-bottle.json` and (if present)
-    `$CWD/claude-bottle.json`.
-  - Creates `$HOME/.claude-bottle/{bottles,agents}/` dirs.
-  - For each `bottles[<name>]`, writes
-    `$HOME/.claude-bottle/bottles/<name>.md` with frontmatter
-    rendered from the bottle dict, body empty (or a one-line
-    "Migrated from claude-bottle.json on <date>" stub).
-  - For each home `agents[<name>]`, writes
-    `$HOME/.claude-bottle/agents/<name>.md` with frontmatter
-    (bottle, skills, etc.) and body = `prompt`.
-  - For each cwd `agents[<name>]` (if cwd JSON existed),
-    writes `$CWD/.claude-bottle/agents/<name>.md`.
-  - Refuses to overwrite existing MD files; if a target
-    already exists, prints what would have been written and
-    bails on that file (continues with the others).
-  - Prints a summary at the end: N bottles written, M agents
-    written, what was skipped.
-
 - **Docs.** README's manifest section rewrites against the new
   layout. `claude-bottle.example.json` becomes
   `examples/bottles/dev.md` + `examples/agents/implementer.md`.
@@ -238,9 +211,7 @@ Each test runs against a temporary `$HOME` and a temporary `$CWD`:
   - `tests/unit/test_yaml_subset_parser.py` — the parser
     itself, including all the rejection cases listed above.
   - `tests/unit/test_manifest_md_load.py` — directory-globbing
-    + assembly, the 8 success criteria.
-  - `tests/integration/test_migrate_manifest.py` — round-trip
-    JSON → MD; idempotency.
+    + assembly, the seven success criteria.
   - Existing integration tests keep working (the only public
     entry points they hit are `Manifest.resolve` and
     `Manifest.from_json_obj`).
@@ -248,7 +219,9 @@ Each test runs against a temporary `$HOME` and a temporary `$CWD`:
 ### Out of scope
 
 - Watching the directory for changes mid-session.
-- A migration tool for moving back (MD → JSON).
+- An automated migration command. Existing JSON users
+  hand-rewrite into the new layout. The README rewrite
+  documents the new shape; that's the migration surface.
 - Validating that frontmatter `name:` matches the filename.
   Soft check via a warn log if mismatched, but not enforced.
 - A bottle/agent dependency graph beyond the existing `bottle:`
@@ -378,9 +351,6 @@ def parse_frontmatter(text: str) -> tuple[dict[str, object], str]:
   a programmatic entry point (used by tests). New
   `Manifest.from_md_dirs(home_dir, cwd_dir)` for the loader.
 - **`claude_bottle/yaml_subset.py`** — new. The parser.
-- **`claude_bottle/cli/migrate_manifest.py`** — new. The
-  migration command.
-- **`claude_bottle/cli/__init__.py`** — wire the new subcommand.
 - **`README.md`** — manifest section rewritten against the new
   layout.
 - **`claude-bottle.example.json`** — removed; replaced by an
@@ -396,14 +366,15 @@ etc. all stay the same shape. Only the loader changes.
 
 ### Backward compatibility
 
-This is a breaking change for v1 users. Mitigations:
+This is a breaking change for v1 users. claude-bottle has a
+single primary user today, so migration is one person rewriting
+one file — no automated migration command is in scope.
 
-- `./cli.py migrate-manifest` does the heavy lifting in one
-  command.
-- If `claude-bottle.json` exists in `$HOME` or `$CWD` *and* the
-  new directories don't exist, the resolver dies with a clear
-  pointer at the migration command — not silently merging
-  formats, not silently dropping the JSON content.
+If `claude-bottle.json` exists in `$HOME` or `$CWD` *and* the
+new `.claude-bottle/` directory does not exist, the resolver
+dies with a clear pointer at the README's manifest section —
+not silently merging formats, not silently dropping the JSON
+content.
 
 ## Open questions
 
@@ -427,11 +398,6 @@ This is a breaking change for v1 users. Mitigations:
   pattern will be "every bottle allows api.anthropic.com and
   github.com"; do we want a way to share the list? Default no
   for v1; revisit if it bites.
-- **Migration tool destructive vs additive.** Default
-  additive (writes new files, leaves old JSON in place). If
-  users find the half-migrated state confusing, switch to
-  printing a "delete claude-bottle.json now" reminder at the
-  end of the migration.
 
 ## References