diff --git a/skills/agent-estate/SKILL.md b/skills/agent-estate/SKILL.md
new file mode 100644
index 000000000..e0bf841f9
--- /dev/null
+++ b/skills/agent-estate/SKILL.md
@@ -0,0 +1,122 @@
+---
+name: agent-estate
+description: Perpetual autonomous work loop for Claude Code — no end condition, no memory regression, no context overfill. Maintains a persistent ledger across all sessions.
+---
+
+# Agent Estate
+
+Perpetual autonomous work loop plugin for Claude Code. Turns Claude into an agent that works cycle after cycle, maintaining a persistent ledger across all sessions, never stopping until explicitly told to.
+
+## Overview
+
+Agent Estate creates an infinite work loop by intercepting Claude's stop events via a shell hook. Each time Claude tries to exit, the hook blocks the exit, increments the cycle counter, and re-injects the prompt — creating a true perpetual agent.
+
+## Architecture
+
+```
+agent-estate/
+├── .claude-plugin/plugin.json   # Plugin manifest (name, version, author)
+├── commands/
+│   ├── start.md                 # /agent-estate:start — activates the loop
+│   ├── stop.md                  # /agent-estate:stop — removes state file to allow exit
+│   └── status.md                # /agent-estate:status — shows cycle count, ledger summary
+├── hooks/
+│   ├── hooks.json               # Registers stop-hook.sh on the "Stop" event
+│   └── stop-hook.sh             # Core engine: blocks exit, increments cycle, re-injects prompt
+├── scripts/
+│   └── setup-estate.sh          # Creates .claude/agent-estate.local.md state file
+├── LICENSE
+└── README.md
+```
+
+## Key Components
+
+### Stop Hook (`hooks/stop-hook.sh`)
+
+The core engine. Runs on every Claude "Stop" event:
+
+1. Checks if `.claude/agent-estate.local.md` exists (is the loop active?)
+2. If **not active**: exits normally (exit 0)
+3. If **done** (`done: true` in frontmatter): removes state file, exits normally (auto-stop)
+4. If **active and not done**:
+   - Detects rate limits (429) → waits 60s
+   - Detects API overload (529) → waits 30s
+   - Increments cycle counter in the state file
+   - Outputs a JSON `{"decision": "block", "reason": "..."}` to prevent exit
+   - Re-injects the prompt for the next cycle
+
+### Setup Script (`scripts/setup-estate.sh`)
+
+Creates the state file at `.claude/agent-estate.local.md` with YAML frontmatter (`active`, `cycle`, `started_at`, `user_prompt`) and the full cycle protocol instructions. If already active, outputs current state and continues.
+
+### Ledger (`.claude/agent-estate.md`)
+
+The persistent brain — every Claude session reads and updates it. Contains:
+
+- **Current Status** — phase, focus, momentum, cycle count
+- **Session Log** — what happened each session
+- **Worked Things** — table of everything done with files touched
+- **Future Works** — prioritized task queue
+- **More Works** — ideas, discoveries, nice-to-haves
+- **Statistics** — cycles, tests, bugs fixed, features shipped
+- **Tell The Next Claude** — sacred handoff message for cross-context memory
+
+### State File (`.claude/agent-estate.local.md`)
+
+Ephemeral file that signals an active loop. Contains the cycle counter and preserved user prompt. Removing this file (via `/agent-estate:stop`) is the **only** way to end the loop.
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `/agent-estate:start` | Activate the loop in perpetual mode (no end condition) |
+| `/agent-estate:start <prompt>` | Start perpetual mode with a specific task focus |
+| `/agent-estate:start --done <prompt>` | Start in done mode — auto-stops when task is complete |
+| `/agent-estate:status` | Show current cycle, mode, stats, and the latest handoff message |
+| `/agent-estate:stop` | Manually remove the state file to stop the loop |
+
+## Work Priority Protocol
+
+Built into the agent instructions, in order:
+
+1. **Broken things** — failing tests, bugs, errors
+2. **Incomplete things** — half-finished features, TODOs, FIXMEs
+3. **Missing things** — no tests, no error handling
+4. **Ugly things** — code smells, dead code
+5. **Slow things** — performance issues
+6. **New things** — features that improve the project
+7. **Creative things** — surprise the user
+
+## Cycle Protocol
+
+Each cycle follows this pattern:
+
+1. Read `.claude/agent-estate.md` (the ledger)
+2. Decide what to work on next
+3. **Do the work** — write code, fix bugs, add features, run tests
+4. Update the ledger with what was done, discovered, and planned
+5. Update statistics, session log, and "Tell The Next Claude" handoff
+6. Immediately start the next cycle (never stop)
+
+## Prerequisites
+
+- `jq` — required for JSON output in the stop hook
+- Claude Code with plugin support
+
+## Installation
+
+```bash
+git clone https://github.com/MercuriusDream/agent-estate.git
+mkdir -p ~/.claude/plugins/local
+ln -s "$(pwd)/agent-estate" ~/.claude/plugins/local/agent-estate
+chmod +x agent-estate/scripts/setup-estate.sh
+chmod +x agent-estate/hooks/stop-hook.sh
+```
+
+## Tips
+
+- **Long sessions**: Claude Max recommended for extended autonomous runs
+- **Guiding prompts**: Use `/agent-estate:start <prompt>` for focused work without being restrictive
+- **Ledger size**: If it exceeds ~300KB, Claude will auto-summarize older cycles
+- **Resuming**: The ledger persists after stop. Start again and Claude picks up from the handoff
+- **Full autonomy**: No prompt = Claude explores and decides what's most valuable