refactor(skills): consolidate managed skill library 94 -> 25

The managed-skill library was regenerated: 94 narrow per-incident skills
replaced by 25 broader ones (radiance-*, llamacpp-*, homepage-*, fleet/
endpoint ops). Git renders this as mass delete + mass add because whole
directories changed name; old content stays in history at 12c5e88.

Surface check: the 25 on disk are exactly the skills the harness advertises
this session.

agent/managed-skills/llama-server-arch-verify/SKILL.md

@@ -0,0 +1,50 @@
+---
+name: llama-server-arch-verify
+description: Verify llama.cpp binary supports a model architecture without relying on binary grep
+---
+
+# llama-server Arch Verification
+
+## Problem
+`grep -ac <arch> llama-server` returns 0 for ALL architecture names (including ones the binary is actively serving). The arch strings are stored in a packed/constructed form that grep can't catch.
+
+## Solution
+Verify arch support via the source registration table, not binary grep:
+
+1. **Check the source registration** (`src/llama-arch.cpp` or `src/llmarch.h`):
+   ```bash
+   grep -n "gemma4\|qwen3_5\|<arch>" src/llama-arch.cpp
+   ```
+   If the arch is registered in the source at the commit the binary was built from, it's supported.
+
+2. **Verify the binary is current**:
+   ```bash
+   stat -c "%y" /path/to/llama-server
+   git log -1 --format=%cd <commit>
+   ```
+   The binary mtime should be after the commit date.
+
+3. **Check for model-specific source files**:
+   ```bash
+   ls src/models/<arch>.cpp src/models/<arch>-*.cpp 2>/dev/null
+   ```
+
+4. **Check for spec-type support** (for MTP/draft models):
+   ```bash
+   /path/to/llama-server --help 2>&1 | grep "spec-type\|model-draft"
+   ```
+
+## KV Cache Types
+The build's allowed `--cache-type-k` / `--cache-type-v` values:
+`f32, f16, bf16, q8_0, q4_0, q4_1, iq4_nl, q5_0, q5_1`
+
+**No true fp8 KV dtype** — `q8_0` is the "FP8 class" (1.0625 B/elem, 8.5 effective bits).
+
+## Separate Draft Model (MTP assistant)
+For models where the MTP head is a SEPARATE file (not in-file like Swift):
+```bash
+--spec-type draft-mtp \
+--spec-draft-n-max 3 \
+--spec-draft-model /path/to/mtp-assistant.gguf
+```
+The `--spec-draft-model` flag (aka `-md`, `--model-draft`) loads the separate draft file.