Compact amp-style timeline rendering and targeted file reading

Timeline tool display:
- Grep/search: ✓ Grep pattern in filepath
- Read file: ✓ Read filepath @start-end
- Edit file: ✓ Edit filepath
- Bash: ϟ command (lightning bolt prompt)
- Tool results only shown for meaningful output

New search_and_read tool:
- Combines search + read in one operation
- Uses ripgrep --context for surrounding lines
- More efficient than separate search then read

Worker prompt updated to prefer search_and_read over
separate search + read_file calls

1 files changed, 6 insertions, 4 deletions

diff --git a/Omni/Agent/Worker.hs b/Omni/Agent/Worker.hs
index 07293c5..45caf9b 100644
--- a/Omni/Agent/Worker.hs
+++ b/Omni/Agent/Worker.hs
@@ -399,12 +399,14 @@ buildBasePrompt task ns repo =
     <> "- Do not re-run passing tests\n"
     <> "- Do not test files individually when namespace test covers them\n"
     <> "- Aim to complete the task in under 50 tool calls\n\n"
-    <> "LARGE FILE HANDLING:\n"
-    <> "- When reading large files (>500 lines), use line ranges to read only relevant sections\n"
+    <> "EFFICIENT FILE READING:\n"
+    <> "- PREFER search_and_read over separate search + read_file calls\n"
+    <> "- search_and_read finds code AND returns context around matches in one call\n"
+    <> "- Only use read_file with line ranges (start_line/end_line) for targeted reads\n"
+    <> "- NEVER read entire large files - always search first, then read specific sections\n"
     <> "- For edit_file, use minimal unique context - just enough lines to match uniquely\n"
     <> "- If edit_file fails with 'old_str not found', re-read the exact lines you need to edit\n"
-    <> "- After 2-3 failed edits on the same file, STOP and reconsider your approach\n"
-    <> "- Very large files (>2000 lines) may need refactoring - note this for human review\n\n"
+    <> "- After 2-3 failed edits on the same file, STOP and reconsider your approach\n\n"
     <> "Context:\n"
     <> "- Working directory: "
     <> Text.pack repo