Add 'handoff' skill to improve workflow documentation and agent transitions

.claude-plugin/plugin.json

@@ -13,6 +13,7 @@
     "./skills/engineering/prototype",
     "./skills/productivity/caveman",
     "./skills/productivity/grill-me",
+    "./skills/productivity/handoff",
     "./skills/productivity/write-a-skill"
   ]
 }

README.md

@@ -163,6 +163,7 @@ General workflow tools, not code-specific.
 
 - **[caveman](./skills/productivity/caveman/SKILL.md)** — Ultra-compressed communication mode. Cuts token usage ~75% by dropping filler while keeping full technical accuracy.
 - **[grill-me](./skills/productivity/grill-me/SKILL.md)** — Get relentlessly interviewed about a plan or design until every branch of the decision tree is resolved.
+- **[handoff](./skills/productivity/handoff/SKILL.md)** — Compact the current conversation into a handoff document so another agent can continue the work.
 - **[write-a-skill](./skills/productivity/write-a-skill/SKILL.md)** — Create new skills with proper structure, progressive disclosure, and bundled resources.
 
 ### Misc

skills/in-progress/README.md

@@ -2,7 +2,6 @@
 
 Skills that are still being developed. They're not ready to ship — expect rough edges, breaking changes, and abandoned experiments. They're excluded from the plugin and the top-level README until they graduate to a stable bucket.
 
-- **[handoff](./handoff/SKILL.md)** — Compact the current conversation into a handoff document so another agent can continue the work.
 - **[review](./review/SKILL.md)** — Review changes since a fixed point along two parallel axes: **Standards** (does the diff follow the repo's coding standards?) and **Spec** (does the diff faithfully implement the originating issue/PRD?).
 - **[writing-beats](./writing-beats/SKILL.md)** — Shape an article as a journey of beats, choose-your-own-adventure style. Pick a starting beat, write only that beat, then pivot to the next, until the article reaches a natural end.
 - **[writing-fragments](./writing-fragments/SKILL.md)** — Grilling session that mines you for fragments — heterogeneous nuggets of writing — and appends them to a single document as raw material for a future article.

skills/productivity/README.md

@@ -4,4 +4,5 @@ General workflow tools, not code-specific.
 
 - **[caveman](./caveman/SKILL.md)** — Ultra-compressed communication mode. Cuts token usage ~75% by dropping filler while keeping full technical accuracy.
 - **[grill-me](./grill-me/SKILL.md)** — Get relentlessly interviewed about a plan or design until every branch of the decision tree is resolved.
+- **[handoff](./handoff/SKILL.md)** — Compact the current conversation into a handoff document so another agent can continue the work.
 - **[write-a-skill](./write-a-skill/SKILL.md)** — Create new skills with proper structure, progressive disclosure, and bundled resources.