Merge upstream origin/main (v2.60.0) with fork customizations preserved

Incorporates 78 upstream commits while preserving all local fork intent:
- Keep deleted: dhh-rails, kieran-rails, dspy-ruby, andrew-kane-gem-writer (FastAPI pivot)
- Merge both: ce-review (zip-agent-validator + design-conformance-reviewer wiring),
  kieran-python-reviewer (upstream pipeline + FastAPI conventions),
  ce-brainstorm/ce-plan/ce-work (upstream improvements + deploy wiring checks),
  todo-create (upstream template refs + assessment block),
  best-practices-researcher (upstream rename + FastAPI refs)
- Accept remote: 142 remote-only files, plugin.json, README.md
- Keep local: 71 local-only files (custom agents, skills, commands, voice)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

plugins/compound-engineering/skills/proof-push/SKILL.md

@@ -0,0 +1,45 @@
+---
+name: proof-push
+description: This skill should be used when the user wants to push a markdown document to a running Proof server instance. It accepts a file path as an argument, posts the markdown content to the Proof API, and returns the document slug and URL. Triggers on "push to proof", "proof push", "open in proof", "send to proof", or any request to render markdown in Proof.
+---
+
+# Proof Push
+
+Push a local markdown file to a running Proof server and open it in the browser.
+
+## Usage
+
+Accept a markdown file path as the argument. If no path is provided, ask for one.
+
+### Execution
+
+Run the bundled script to post the document:
+
+```bash
+bash scripts/proof_push.sh <file-path> [server-url]
+```
+
+- `file-path` — absolute or relative path to a `.md` file (required)
+- `server-url` — Proof server URL, defaults to `http://localhost:4000`
+
+The script:
+1. Reads the file content
+2. POSTs to `/share/markdown` as JSON with `{markdown, title}`
+3. Returns the slug, base URL, and editor URL with access token
+
+### Output
+
+Report the returned slug and URLs to the user. The editor URL (with token) gives full edit access.
+
+### Error Handling
+
+If the script fails, check:
+- Is the Proof server running? (`curl http://localhost:4000`)
+- Does the file exist and contain non-empty markdown?
+- Is `jq` installed? (required for JSON construction)
+
+## Resources
+
+### scripts/
+
+- `proof_push.sh` — Shell script that posts markdown to Proof's `/share/markdown` endpoint and returns the document slug and URLs.

plugins/compound-engineering/skills/proof-push/scripts/proof_push.sh

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+#!/usr/bin/env bash
+# Push a markdown file to a running Proof server and return the document URL.
+# Usage: proof_push.sh <path-to-markdown> [server-url]
+set -euo pipefail
+
+FILE="${1:?Usage: proof_push.sh <markdown-file> [server-url]}"
+SERVER="${2:-http://localhost:4000}"
+UI_URL="${3:-http://localhost:3000}"
+
+if [[ ! -f "$FILE" ]]; then
+  echo "error: file not found: $FILE" >&2
+  exit 1
+fi
+
+TITLE=$(basename "$FILE" .md)
+
+RESPONSE=$(curl -s -X POST "${SERVER}/share/markdown" \
+  -H "Content-Type: application/json" \
+  -d "$(jq -n --arg md "$(cat "$FILE")" --arg title "$TITLE" '{markdown: $md, title: $title}')")
+
+SLUG=$(echo "$RESPONSE" | jq -r '.slug // empty')
+ERROR=$(echo "$RESPONSE" | jq -r '.error // empty')
+
+if [[ -z "$SLUG" ]]; then
+  echo "error: failed to create document${ERROR:+: $ERROR}" >&2
+  echo "$RESPONSE" >&2
+  exit 1
+fi
+
+TOKEN_PATH=$(echo "$RESPONSE" | jq -r '.tokenPath // empty')
+
+echo "slug: $SLUG"
+echo "url: ${UI_URL}/d/${SLUG}"
+[[ -n "$TOKEN_PATH" ]] && echo "editor-url: ${UI_URL}${TOKEN_PATH}"