chore: drop the duplicated package descriptions from root apm.yml

Why: for a local-path marketplace entry, apm treats a root description: as
an override of the package's own apm.yml, reported only at verbose level,
so the "two copies stay identical" rule had no enforcement. Same fix as
2def060 made for version:.

Implementation Notes:
- All six root copies matched their package apm.yml before removal; the
  compiled marketplace.json descriptions are unchanged.
- apm-workflow references now scope the "omit it" advice to local-path
  entries: on a remote entry, version: is the semver range that selects
  the tag, and version: or ref: is required.

Impact: ADR-0021 amended; the package apm.yml is the single source.

ADR: 0021
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

apm.yml

@@ -75,31 +75,25 @@ marketplace:
 
   packages:
     - name: kyberforge
-      description: Skills and agents for creating, maintaining, and managing a Claude Code / Copilot CLI plugin marketplace.
       source: ./plugins/kyberforge
       category: Developer Tools
 
     - name: bin
-      description: Skills for everyday AI-assisted development work that is not tied to a single tool, forge or language, and has not yet been split into a focused plugin.
       source: ./plugins/bin
       category: Utilities
 
     - name: git
-      description: Skills and agents for working with a local Git clone over the git wire protocol, and for authoring and running the pre-commit hooks that guard it.
       source: ./plugins/git
       category: Version Control
 
     - name: gitea
-      description: Skills and agents for working with a Gitea forge through its HTTP API — the forge's own objects, as distinct from the local git clone.
       source: ./plugins/gitea
       category: Version Control
 
     - name: core
-      description: Skills for authoring and auditing a repo's AGENTS.md and the provider adapter files that defer to it.
       source: ./plugins/core
       category: Productivity
 
     - name: lint
-      description: Skills and agents for configuring and running linters.
       source: ./plugins/lint
       category: Developer Tools

docs/adr/0021-plugin-descriptions-state-a-domain-boundary.md

@@ -18,6 +18,9 @@ file, `.claude-plugin/marketplace.json`. Read the "four generated files" in Cont
 generated files" in Consequences as historical counts, true when written. The blast radius shrank;
 the staleness hazard that motivated this ADR did not.
 
+**Amended 2026-09-16:** the root `marketplace.packages[]` copy of each description was removed; the
+package `apm.yml` is now the single source. See the amendment before Consequences.
+
 ## Context
 
 A plugin's published description is one string authored twice — in `plugins/<name>/apm.yml` and in
@@ -203,6 +206,32 @@ sit inside ADR-0020's tiers; the tier would have been silent through all three f
 string, not a link — and the README's own plugin list carries the same enumeration with the same
 staleness, so this relocates the defect rather than fixing it.
 
+## Amendment (2026-09-16): the root copy is removed — the package `apm.yml` is the single source
+
+The Decision's rule that "the two copies … stay identical" is retired by removing the second copy.
+The six `description:` lines under root `apm.yml`'s `marketplace.packages[]` are deleted, the same way
+`2def060` deleted the six `version:` lines beside them. `plugins/<name>/apm.yml`'s `description:` is
+now the only place a package's published description is authored.
+
+The rule's own justification — "the root entry is what reaches the compiled marketplace" — was true
+only while the root entry set the field. apm's Claude marketplace mapper resolves a local-path entry's
+`description` curator-first: the entry's value wins when present, and when it is absent the value is
+read from the package's own `apm.yml` (`apm_cli/marketplace/output_mappers.py`, the `is_local` branch
+calling `_apply_field_with_precedence` with `source_label="package apm.yml"`). The root copy was
+therefore an override, not a mirror. Nothing enforced the identity rule, and on drift apm silently
+published the root value. Removing the copy removes the drift rather than leaving it unchecked.
+
+All six root copies were byte-identical to their package's `apm.yml` when they were removed. After
+the removal, `apm pack` regenerated `.claude-plugin/marketplace.json` with every `description` unchanged,
+and `apm pack --check-versions --check-clean --dry-run` passes. The consequence for the "unbounded
+obligation" in Context is that a description edit is now one edit, not two. The package version bump
+and the catalog patch bump it earns are unchanged
+(`plugins/kyberforge/.apm/skills/apm-workflow/references/configure.md`).
+
+This applies to local-path (`source: ./…`) entries only. A remote entry has no local package
+`apm.yml` to fall back to. Its `description:`, when set, is still the published text, and when it
+is absent apm uses whatever its best-effort remote metadata fetch returns.
+
 ## Consequences
 
 **Three descriptions are rewritten and the compiled output regenerated.** Eight generated files

plugins/kyberforge/.apm/skills/apm-workflow/references/configure.md

@@ -53,13 +53,19 @@ output changes.** Two triggers, not one:
 The version belongs to the package, not to the repo: editing `plugins/foo/.apm/` never bumps
 `plugins/bar/apm.yml`.
 
-Under a `per_package` strategy this `version:` is the single source: when a catalog's
-`marketplace.packages[]` entry omits `version:`, `apm pack` reads it from the package's `apm.yml`.
-Do not restate it there. A `version:` on the entry is an override, not a copy — it silently wins in
-the compiled `marketplace.json`, and `apm pack --check-versions` still reports `[matches]` when it
-disagrees with the package's own number, so drift between the two is never caught. Set one only
-when an override is the intent. A skipped bump is not caught either: nothing infers intent from a
-content diff. The catalog's own version follows a separate rule — see `references/marketplace.md`.
+Under a `per_package` strategy this `version:` is the single source for a local-path
+(`source: ./…`) catalog entry: when that `marketplace.packages[]` entry omits `version:`,
+`apm pack` reads it from the package's `apm.yml`. Do not restate it there. On a local entry a
+`version:` is an override, not a copy — it silently wins in the compiled `marketplace.json`, and
+`apm pack --check-versions` still reports `[matches]` when it disagrees with the package's own
+number, so drift between the two is never caught. Set one only when an override is the intent.
+`description:` behaves the same way: a local entry that omits it publishes the package `apm.yml`'s
+`description`, and one that sets it silently overrides it. A remote entry is different. There,
+`version:` is the semver range that selects which git tag to resolve, and a remote entry must carry
+`version:` or `ref:`. Its `description:`, when set, is the published text.
+
+A skipped bump is not caught either: nothing infers intent from a content diff. The catalog's own
+version follows a separate rule — see `references/marketplace.md`.
 
 ## Dependency reference forms
 

plugins/kyberforge/.apm/skills/apm-workflow/references/marketplace.md

@@ -68,10 +68,13 @@ marketplace:
 
 Without this block, the default versioning strategy ties every listed package to the marketplace/root version.
 
-With it, each entry's version comes from its package's own `apm.yml`. An entry may also set
-`version:`, but that is an override: it silently wins in the compiled `marketplace.json`, and
-`apm pack --check-versions` does not flag the mismatch. Omit it unless an override is intended —
-see `references/configure.md`.
+With it, each local-path (`source: ./…`) entry's version comes from its package's own
+`apm.yml`, and so does its `description`. A local entry may also set `version:` or `description:`,
+but either one is an override: it silently wins in the compiled `marketplace.json`, and
+`apm pack --check-versions` does not flag a version mismatch. Omit both unless an override is
+intended — see `references/configure.md`. A remote entry is different: its `version:` is the semver
+range that selects the git tag to resolve (matched through the entry's `tag_pattern`, else
+`build.tagPattern`), not an override, and the entry must set `version:` or `ref:`.
 
 ## Bumping the catalog's own version (repo policy)
 
@@ -86,9 +89,10 @@ earned it:
 - **Patch** when the set of packages is unchanged but what the catalog publishes moved: a
   `marketplace:`-block field (the catalog description, owner, `build:`/`outputs:` config, or an
   existing entry's description or category), or any listed package's own `apm.yml` `version:`. The
-  most frequent trigger by far is the package bump. The root entry carries no `version:`, but the
-  compiled `marketplace.json` publishes each package's version, so a package bump alone changes the
-  catalog and alone earns the patch — made in the same commit (see `references/configure.md`).
+  most frequent trigger by far is the package bump. When entries omit `version:` (the recommended
+  local form), the compiled `marketplace.json` still publishes each package's version, so a package
+  bump alone changes the catalog and alone earns the patch — made in the same commit (see
+  `references/configure.md`).
 
 Keep the root `apm.yml`'s top-level `version:` in step with `marketplace.version`. They are separate
 keys — the top-level one is not inherited into the compiled `marketplace.json`, but `apm audit`