docs: add deploy scripts, skills, and pattern guides

Deploy scripts for webicached and webid (build, upload, restart).
AGENTS.md with releases.conf reference and variant tagging docs.
Installer archive pattern guide and version oddities reference.

docs/version-oddities.md

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+# Version & Release Oddities
+
+Non-standard version formats and tag prefixes that affect parsing, sorting,
+and classification. The Go classifier and `internal/lexver` must handle all
+of these.
+
+## Non-Numeric Tag Prefixes
+
+| Package | Raw Tag | Cleaned | Transform |
+|---------|---------|---------|-----------|
+| lf | `r21` | `0.21.0` | `r` prefix → prepend `0.` |
+| bun | `bun-v1.0.0` | `1.0.0` | Strip `bun-` prefix |
+| jq | `jq-1.7` | `1.7` | Strip `jq-` prefix |
+| watchexec | `cli-v1.2.3` | `1.2.3` | Strip `cli-` prefix |
+| ffmpeg | `b6.0` | `6.0` | Strip `b` prefix |
+
+## Underscore-Delimited Tags
+
+| Package | Raw Tag | Cleaned | Transform |
+|---------|---------|---------|-----------|
+| postgres | `REL_17_0` | `17.0` | Strip `REL_`, replace `_` with `.` |
+| psql | `REL_17_0` | `17.0` | Same as postgres |
+
+## Platform Suffix in Version
+
+| Package | Raw Tag | Cleaned | Transform |
+|---------|---------|---------|-----------|
+| git (Windows) | `2.41.0.windows.1` | `2.41.0` | Strip `.windows.N` suffix |
+
+## 4-Part Versions
+
+| Package | Example | Notes |
+|---------|---------|-------|
+| chromedriver | `121.0.6120.0` | Google Chrome's versioning |
+| gpg | `2.2.19.0` | 4th segment is build metadata |
+
+## Date-Based Versions
+
+| Package | Notes |
+|---------|-------|
+| atomicparsley | Date-based version strings |
+
+## Complex Pre-Release Formats
+
+| Package | Example | Notes |
+|---------|---------|-------|
+| flutter | `2.3.0-16.0.pre` | Extra dots and numeric segments |
+| iterm2 | `iTerm2_3_5_0beta17` | Underscores, beta attached → `3.5.0-beta17` |
+
+## Channel Detection
+
+- Node.js: odd major = "current" not LTS (v15, v17, v19, v21, v23)
+- Go: `go` prefix stripped (`go1.23.6` → `1.23.6`)
+- Terraform: `-alpha`, `-beta`, `-rc` suffixes → beta channel
+
+## Directory Symlinks (Aliases)
+
+These are directory-level symlinks. They share all files (including
+releases.conf) with their target automatically.
+
+```
+msvc-runtime    → vcruntime
+msvcruntime     → vcruntime
+rust.vim        → vim-rust
+vc-redist       → vcruntime
+vc-runtime      → vcruntime
+vc_redist       → vcruntime
+vcredist        → vcruntime
+vcruntime140    → vcruntime
+vim-essential   → vim-essentials
+vim-mouse       → vim-gui
+vps-myip        → myip
+xcode-cli       → commandlinetools
+```