refactor(mem0-plugin): improve hook scripts, config parsing, and skill definitions

Update git commit capture with better error handling, enhance user prompt hook,
extend config parser capabilities, and refine skill docs for dream, health,
mcp, pin, and stats skills.

mem0-plugin/skills/mem0-health/SKILL.md

@@ -79,7 +79,9 @@ If any check fails, add a `## Troubleshooting` section with specific fix steps f
 
 ## Extended mode: Memory Quality Analysis
 
-When invoked with `--deep` (e.g., `/mem0:health --deep`), run the standard 5 checks above **plus** a memory quality scan:
+When invoked with `--deep` (e.g., `/mem0:health --deep`) or `--fix` (e.g., `/mem0:health --fix`), run the standard 5 checks above **plus** a memory quality scan.
+
+`--fix` implies `--deep` and automatically applies safe fixes after showing the analysis (see bottom of this section).
 
 ### Quality Check 1: Duplicates
 
@@ -101,6 +103,15 @@ Stale candidates: <N>
   [mem0:<id>] — session_state, 142d old
 ```
 
+### Quality Check 2b: Low-confidence memories
+
+Flag memories where `metadata.confidence` < 0.5 (regardless of age). Report separately from stale:
+
+```
+Low-confidence memories: <N>
+  [mem0:<id>] — confidence=0.3, "<content preview>"
+```
+
 ### Quality Check 3: Contradictions
 
 Within each `metadata.type` group, flag pairs that assert opposing facts about the same topic. Use semantic judgment — look for negation patterns, conflicting tool/framework choices, or reversed decisions.
@@ -131,3 +142,22 @@ Untagged/orphan memories: <N>
 ```
 
 If all counts are 0: `Memory quality: clean. No duplicates, stale entries, or contradictions found.`
+
+### Auto-fix mode (`--fix`)
+
+When `--fix` is passed, apply these safe fixes automatically after displaying the quality summary:
+
+1. **Orphans:** For each untagged memory, infer a `metadata.type` from content and call `update_memory` to set it. If inference is uncertain, skip.
+2. **Stale `session_state`/`compact_summary` > 90d:** Delete them via `delete_memory`. These are ephemeral by design.
+3. **Duplicates:** Do NOT auto-merge — print "Run `/mem0:dream` to merge duplicates" instead.
+4. **Contradictions:** Do NOT auto-resolve — print "Run `/mem0:dream` to resolve contradictions" instead.
+5. **Low-confidence < 0.3 AND > 30d old:** Delete them via `delete_memory`.
+
+Print a summary of actions taken:
+
+```
+## Auto-fix Results
+  Deleted: <N> stale, <N> low-confidence
+  Retagged: <N> orphans
+  Skipped: <N> duplicates (use /mem0:dream), <N> contradictions (use /mem0:dream)
+```