fix(observer): improve Windows compatibility for temp files and Haiku prompt

Address remaining issues from #842 after PR #903 moved temp files to
PROJECT_DIR/.observer-tmp:

Bug A (path resolution): Use relative paths (.observer-tmp/filename)
in the prompt instead of absolute paths from mktemp. On Windows
Git Bash/MSYS2, absolute paths use MSYS-style prefixes (/c/Users/...)
that the spawned Claude subprocess may fail to resolve.

Bug B (asks for permission): Add explicit IMPORTANT instruction block
at the prompt start telling the Haiku agent it is in non-interactive
--print mode and must use the Write tool directly without asking for
confirmation.

Additional improvements:
- Pass prompt via -p flag instead of stdin redirect for Windows compat
- Add .observer-tmp/ to .gitignore to prevent accidental commits

Fixes #842

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Signed-off-by: Lidang-Jiang <lidangjiang@gmail.com>

.gitignore

@@ -83,6 +83,9 @@ temp/
 *.bak
 *.backup
 
+# Observer temp files (continuous-learning-v2)
+.observer-tmp/
+
 # Rust build artifacts
 ecc2/target/
 

skills/continuous-learning-v2/agents/observer-loop.sh

@@ -62,9 +62,16 @@ analyze_observations() {
   analysis_count=$(wc -l < "$analysis_file" 2>/dev/null || echo 0)
   echo "[$(date)] Using last $analysis_count of $obs_count observations for analysis" >> "$LOG_FILE"
 
+  # Use relative path from PROJECT_DIR for cross-platform compatibility (#842).
+  # On Windows (Git Bash/MSYS2), absolute paths from mktemp may use MSYS-style
+  # prefixes (e.g. /c/Users/...) that the Claude subprocess cannot resolve.
+  analysis_relpath=".observer-tmp/$(basename "$analysis_file")"
+
   prompt_file="$(mktemp "${observer_tmp_dir}/ecc-observer-prompt.XXXXXX")"
   cat > "$prompt_file" <<PROMPT
-Read ${analysis_file} and identify patterns for the project ${PROJECT_NAME} (user corrections, error resolutions, repeated workflows, tool preferences).
+IMPORTANT: You are running in non-interactive --print mode. You MUST use the Write tool directly to create files. Do NOT ask for permission, do NOT ask for confirmation, do NOT output summaries instead of writing. Just read, analyze, and write.
+
+Read ${analysis_relpath} and identify patterns for the project ${PROJECT_NAME} (user corrections, error resolutions, repeated workflows, tool preferences).
 If you find 3+ occurrences of the same pattern, you MUST write an instinct file directly to ${INSTINCTS_DIR}/<id>.md using the Write tool.
 Do NOT ask for permission to write files, do NOT describe what you would write, and do NOT stop at analysis when a qualifying pattern exists.
 
@@ -117,10 +124,11 @@ PROMPT
     max_turns=10
   fi
 
-  # Prevent observe.sh from recording this automated Haiku session as observations
+  # Prevent observe.sh from recording this automated Haiku session as observations.
+  # Pass prompt via -p flag instead of stdin redirect for Windows compatibility (#842).
   ECC_SKIP_OBSERVE=1 ECC_HOOK_PROFILE=minimal claude --model haiku --max-turns "$max_turns" --print \
     --allowedTools "Read,Write" \
-    < "$prompt_file" >> "$LOG_FILE" 2>&1 &
+    -p "$(cat "$prompt_file")" >> "$LOG_FILE" 2>&1 &
   claude_pid=$!
 
   (