chore: sync canonical Amp snapshot 3ea78b0

[oliver-kriska]

Summary

Project the exact generated Amp target from canonical claude-elixir-phoenix PR #132 into the public standalone distribution, refresh the manifest, and align standalone docs/tests with current Amp hosted-native and paired-full behavior.

This PR intentionally targets main for review only. It does not update mutable stable; promotion remains gated on the canonical change merging and this repository's required review/CI.

Changes

• Copy the exact 51-skill tree and generated plugin from canonical commit 3ea78b0fbae186840121aace789e86fe70e361dc.
• Keep the generated plugin at 95,269 bytes to fit Amp's hosted process-argument transport while preserving reconstructed specialist instructions.
• Regenerate distribution-manifest.json for all 252 generated files.
• Cover machine-local precedence, exposed parent-directory resolution, and invalid candidate fallback in the standalone behavior harness with an isolated HOME.
• Document native skill: invoke, hosted-native versus paired-full, machine-local versus personal/workspace hosted scope, wrapper resolution boundaries, and the paired-only phx-full plugin gate.
• Type-check against the current @ampcode/plugin package (0.0.0-20260811001717-g1583b94).
• Refresh brace-expansion from 5.0.8 to 5.0.9 in the lockfile to clear GHSA-rgw5-rvv9-x895; no direct dependency ranges changed.

Publication provenance

Item	Immutable value
Canonical repository	oliver-kriska/claude-elixir-phoenix
Canonical commit	3ea78b0fbae186840121aace789e86fe70e361dc
Canonical review	oliver-kriska/claude-elixir-phoenix#132
Standalone commit	f92519305a0b125503ee10feeb70bfc2c5a7cacf
Generated plugin SHA-256	6f419491670fcf21a58268b0e9b628001fa7220b670688f5dfaa6578fd78d832
Skills tree SHA-256 (path/mode/length/content framing)	075e729b08d3606e1b651ac3a69bc557d8ad3a78173a7fa9d7791f1891e257dc
Distribution manifest SHA-256	5e897fb661615d42879f9a365646aeef0a44a62f7d07ddab340604eb5191dab2
Canonical generated-target snapshot SHA-256	e1ab10d49d1d3a8f206125d63f8a54cd27acfc713151f50f059d3e7c323db0e6

A byte-and-mode parity check passed for all 251 skill files plus the generated plugin before commit.

Verification

• npm test on Node 22.22.2 — PASS: manifest (252 files), distribution validation (51 skills, 40 workflows, one plugin), current API typecheck, behavior harness, and Markdown lint.
• npm audit --audit-level=high — PASS, 0 vulnerabilities.
• Latest Amp runtime smoke — PASS with 0.0.1786436318-g8453bf (released 2026-08-11): generated plugin loaded through amp plugins exec without model calls.
• Personal hosted transport pilot — PASS: the exact plugin loaded user-scoped with all 45 commands and both parallel tools; personal hosted plugin commit 0e4c2ce689d6515ca1d4a19e7a6365753acac637.
• git diff --check — PASS.
• Canonical CI at the source commit — PASS across all six jobs.

Promotion gate

Do not merge/promote this PR or move stable until canonical PR #132 has merged and the normal standalone review/CI requirements are satisfied. After merge, this repository's existing green-only workflow may promote the exact validated main commit to stable.