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Linux_post_install/AGENTS.md
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Your Name 52413a6a68 feat: pos tree — print the CLI command tree 
pos tree derives the hierarchy live from bin/pos-* filenames + # POS:
/# POS_SUBCMDS: headers, so it always matches what the dispatcher can
run. Category-less tool (like pos-config); --depth N limits nesting.

Also sharpen the agent-facing docs that the work exposed:
- AGENTS.md: drop the stale "one category-less exception" claim; document
  the category-less pattern (pos-config, pos-tree) and that gen only reads
  the text after the first em-dash in # POS: headers
- DEV.md: category-less vs categorized rule + header extraction note
- AGENT_Context "Adding a New Tool": new step 0 — pin the exact CLI verb
  and runtime context (dev/repo-only vs installed) before writing code
- POS.md: new config + tree sections; category-less tools get their own
  sections
- README: pos tree bullet following the pos X convention
2026-08-09 12:50:52 +00:00

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Linux_post_install — Agent Instructions

Personal bootstrap & homelab toolkit for Debian/Ubuntu (Bash). install.sh bootstraps a machine; bin/pos is the unified CLI.

External File Loading

CRITICAL: real guidance lives in DOC/. When you encounter a reference below, use your Read tool to load it on a need-to-know basis — do NOT preemptively load all of them. Once loaded, treat the content as mandatory instructions.

  • @DOC/AGENT_Context_Project.md — project overview, directory structure, pos dispatch table, "How to modify" table. Read FIRST for any non-trivial task. It opens with a Document Map (auto-generated line ranges for every section) — use it to jump straight to the relevant section.
  • @DOC/DEV.md — conventions, verification, and the "Adding a new Feature/App/Tool" checklists. Read before creating or changing code/docs.
  • @DOC/POS.md — pos CLI reference (dispatcher + every command). Read when working on bin/pos* scripts or their docs.
  • @DOC/README.md — index of all docs. Read to find the right doc.
  • @DOC/HOWTO.md — hands-on per-category guides (network, docker, media, system, ssh, usb, communication, entertainment). Read when a task is about using pos day-to-day rather than extending it.

Quick facts

  • Tool model: bin/pos-<category>-<command>, or category-less bin/pos-<cmd> for dispatcher/dev-level commands that fit no category (pos-config, pos-tree) — they dispatch like any tool and show with an empty category in the generated tables. bin/pos dispatches by longest-prefix arg matching. New tools are auto-discovered but must be executable (100755) and carry a # POS: <cat> <cmd> — <desc> header right after the shebang; make gen only uses the text after the first — (the leading words are convention-only), so keep the one-line description concise. # POS_FLAGS: / # POS_SUBCMDS: / # POS_CONFIG: headers feed tab-completion and the pos config scope registry. A missing # POS: header hard-fails make gen.
  • Generated code: blocks between GEN:START/GEN:END markers in DOC/AGENT_Context_Project.md (tree, dispatch, selfcontained, filetable, docmap) and completions/pos.bash (flags, subcmds, config scopes) are make gen output — never hand-edit them. After touching bin/pos-*, run make gen then make check (bash -n + exec-bit check + doc-sync gate + dispatch smoke; definition of done). Hand-maintained, not gen-checked: DOC/POS.md, the line-count rows above the filetable marker (e.g. lib/common.sh), bin/pos usage() EXAMPLES, root README.
  • Stdin gotcha: any tool that reads stdin must be added to INTERACTIVE_CMDS in bin/pos — otherwise the logging tee pipe hangs on (or swallows) the prompt.
  • Deps: apt packages → PACKAGES array in preinstall.sh; non-apt/manual installers (e.g. usbsrv) → command -v <bin> || err "…" guard inside the tool, never in PACKAGES.
  • Secrets: never commit keys/tokens. config/authorized_keys and config/rclone.conf are gitignored; runtime tool config is ~/.config/linux_post_install/<tool>.env (chmod 600, env-var precedence). Mask tokens in config output.
  • entertainment plugins: standalone scripts in entertainment/ that must NOT source lib/common.sh — stdout is the message that gets sent to Telegram (helper chatter would leak into it). Markers: # POS_PLUGIN: <name> + # POS_KEYS: declarations.
  • Conventions: set -euo pipefail, -h|--help via case, idempotent writes, use run/spawn helpers (respect $DRY_RUN), make hook installs the opt-in pre-commit gate.
  • Maintain AGENT_TODO.md (Now / Next / Later / Done): when you finish a task, move it to Done (dated) in the same commit.
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