docs: add 100-repo validation and token savings to /onboard and /can-i-help sections (#305)

Author: avifenesh

README.md

@@ -885,10 +885,12 @@ The plugin wraps the [agent-analyzer](https://github.com/agent-sh/agent-analyzer
 
 **What happens when you run it:**
 
-1. **Collect** - Pure JavaScript scans manifest, structure, README, CI, git, repo-intel, repo-map (no LLM tokens)
+1. **Collect** (68ms median) - Pure JavaScript scans manifest, structure, README, CI, git, repo-intel (no LLM tokens)
 2. **Synthesize** - Opus agent produces a structured overview: tech stack, key files, active areas, conventions
 3. **Guide** - Interactive Q&A: ask about specific files, areas, or patterns
 
+**74% fewer tokens** than manual onboarding. Validated on 100 repos across JS/TS, Rust, Go, Python, C/C++, Java, and Deno.
+
 **Depth levels:**
 
 | Level | Time | Data |
@@ -897,6 +899,8 @@ The plugin wraps the [agent-analyzer](https://github.com/agent-sh/agent-analyzer
 | normal | ~5s | + CLAUDE.md + CI + repo-intel |
 | deep | ~15s | + repo-map AST symbols |
 
+**Supported manifests:** package.json, Cargo.toml, go.mod, pyproject.toml, deno.json, CMakeLists.txt, meson.build, setup.py, pom.xml, build.gradle. Detects monorepos (npm/pnpm/lerna/Cargo workspaces, Python libs/, Deno workspaces).
+
 **Usage:**
 
 ```bash
@@ -917,7 +921,7 @@ The plugin wraps the [agent-analyzer](https://github.com/agent-sh/agent-analyzer
 
 **What happens when you run it:**
 
-1. **Collect** - Gathers project data + contributor signals (test gaps, doc drift, bugspots, good-first areas, open issues)
+1. **Collect** - Gathers project data + contributor signals (test gaps, doc drift, bugspots, good-first areas, open issues). Validated on 100 repos.
 2. **Match** - Opus agent asks about developer background and matches skills to project needs
 3. **Guide** - For each recommendation: reads code, explains what needs doing, gives a concrete first step