=== ls ===
data
=== ls_data ===
example.feather
example.json
example.jsonl
example.orc
example.parquet
=== stat ===
15533 /onedrive/data/example.json
=== stat_dir ===
10435509 directory
=== cat_head ===
{
  "company": "Strukto",
  "founded": "2024-03-01",
  "valuation": 45000000,
  "departments": [
=== head_1_jsonl ===
{"type":"queue-operation","operation":"enqueue","timestamp":"2026-03-17T13:35:35.319Z","sessionId":"664396f7-55a4-4604-8289-aa7142480db4"}
=== head_3_jsonl ===
{"type":"queue-operation","operation":"enqueue","timestamp":"2026-03-17T13:35:35.319Z","sessionId":"664396f7-55a4-4604-8289-aa7142480db4"}
{"type":"queue-operation","operation":"dequeue","timestamp":"2026-03-17T13:35:35.320Z","sessionId":"664396f7-55a4-4604-8289-aa7142480db4"}
{"type":"file-history-snapshot","messageId":"8e465ae4-600a-4e71-9425-e0624a8fd615","snapshot":{"messageId":"8e465ae4-600a-4e71-9425-e0624a8fd615","trackedFileBackups":{},"timestamp":"2026-03-17T13:35:35.326Z"},"isSnapshotUpdate":false}
=== tail_2_jsonl ===
{"parentUuid":"8ff7c711-f34f-4b26-b728-af326c44a37e","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","slug":"shimmering-leaping-wozniak","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01VSy2shFHtnJqf2T3UphQuz","type":"tool_result","content":"4 passed, 1 skipped in 0.49s","is_error":false}]},"uuid":"ef3cbcb2-231c-413e-9d35-17ba0818eb7e","timestamp":"2026-03-18T00:35:15.036Z","toolUseResult":{"stdout":"4 passed, 1 skipped in 0.49s","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"8ff7c711-f34f-4b26-b728-af326c44a37e"}
{"parentUuid":"ef3cbcb2-231c-413e-9d35-17ba0818eb7e","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","slug":"shimmering-leaping-wozniak","message":{"model":"claude-sonnet-4-6","id":"msg_01JeW9hGRoyBG9nk3r6DJpk8","type":"message","role":"assistant","content":[{"type":"text","text":"Fixed. Extracted the repeated patch prefix into `_patch` to shorten the lines below 79 chars."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":124,"cache_read_input_tokens":55736,"output_tokens":27,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":124,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZ9cDefu8wPNhH6CFxuXN","type":"assistant","uuid":"b63e2adc-7ace-4004-9355-0bd3036cb439","timestamp":"2026-03-18T00:35:17.568Z"}
=== wc_l_jsonl ===
5766 /onedrive/data/example.jsonl
=== wc_c_json ===
15533 /onedrive/data/example.json
=== grep_c_mirage ===
5678
=== grep_m1_mirage ===
{"parentUuid":null,"isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","type":"progress","data":{"type":"hook_progress","hookEvent":"SessionStart","hookName":"SessionStart:startup","command":"\"${CLAUDE_PLUGIN_ROOT}/hooks/run-hook.cmd\" session-start.sh"},"parentToolUseID":"9d685ae2-8848-4dde-a24e-f72554f705e8","toolUseID":"9d685ae2-8848-4dde-a24e-f72554f705e8","timestamp":"2026-03-17T13:34:27.072Z","uuid":"45a63bc8-223d-4468-9973-66da8230f8de"}
=== grep_head ===
{"parentUuid":null,"isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","type":"progress","data":{"type":"hook_progress","hookEvent":"SessionStart","hookName":"SessionStart:startup","command":"\"${CLAUDE_PLUGIN_ROOT}/hooks/run-hook.cmd\" session-start.sh"},"parentToolUseID":"9d685ae2-8848-4dde-a24e-f72554f705e8","toolUseID":"9d685ae2-8848-4dde-a24e-f72554f705e8","timestamp":"2026-03-17T13:34:27.072Z","uuid":"45a63bc8-223d-4468-9973-66da8230f8de"}
{"parentUuid":"45a63bc8-223d-4468-9973-66da8230f8de","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","type":"user","message":{"role":"user","content":[{"type":"text","text":"Ok now let's refactor the mirage/backends\n\nlet's group similar backend together to same subfolder\n\nfor example s3 and r2 are object storage (maybe a better name) etc.\n\nand loader etc we should put to another folder etc\n\nlet's brainstorm and do the refactoring and renaming and new subfolders"}]},"uuid":"8e465ae4-600a-4e71-9425-e0624a8fd615","timestamp":"2026-03-17T13:35:35.325Z","permissionMode":"default"}
{"parentUuid":"8e465ae4-600a-4e71-9425-e0624a8fd615","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","message":{"model":"claude-opus-4-6","id":"msg_01UQCtE3bLbg85yGsyHAyur5","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"The user wants to refactor the mirage/backends directory by grouping similar backends into subfolders. They want to brainstorm first. Let me invoke the brainstorming skill as required.","signature":"EuECCkYICxgCKkAKyWyN/F3hZxKLOD9lNB72rlmx21lBX0HBj4fFoN304wbAYMe0rkeCNjI7W7sEtaTeGCrMVE8gN9u4ry5t8RR0EgyaUbaUKd+2Fumo1aMaDDBawTPuSp5XkDOAISIwnQ6Cb/Br73tJxiasoUgnJzfBqwfBSLoqoggZKKfIq+Vq2d50g83tmikDsD2K+tuaKsgB74kZQGhXIZuIudeWq+24h1NxVP7vQcyklga8wzvSo+/Mi2OjT++y7urRkZ9zT1Fn34/HdLR3T3L0IXcpQiwwswzjyLbzl2BYvYYYlZcPbyHjZOt6SaYX2GzAO4NyucJJPbKdROKP4Bbi8lKccVw9FHv0L8DXxaMAH/3DaHp73m/pjoqtlypq1xigxP7tCsSqmiv1OuskjK7lUvt6jtx741MGo4lDZ7aawNpBQp8ywyPof/eSqm/3ZtEJ17ar260tQjV5VUgjCdMYAQ=="}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":3901,"cache_read_input_tokens":19317,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3901},"output_tokens":12,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZ8jv4bF4iY8jNGNSF3wf","type":"assistant","uuid":"0adf62e8-ae65-40b4-99fa-a0261bf6cdfe","timestamp":"2026-03-17T13:35:40.841Z"}
=== grep_queue_wc ===
86
=== grep_rl_item ===
/onedrive/data/example.jsonl
=== rg_l_item ===
/onedrive/data/example.jsonl
=== grep_rc_mirage ===
/onedrive/data/example.json:3
/onedrive/data/example.jsonl:5678
=== grep_item_parquet ===
id,value,label
5,0.6709052457548175,item_5
=== rg_item_glob_feather ===
id,value,label
5,7.5,item_5
=== ls_glob_parquet ===
/onedrive/data/example.parquet
=== ls_file_json ===
/onedrive/data/example.json
=== find_json ===
/onedrive/data/example.json
=== find_type_f ===
/onedrive/data/example.feather
/onedrive/data/example.json
/onedrive/data/example.jsonl
/onedrive/data/example.orc
/onedrive/data/example.parquet
=== jq_version ===
"3.0"
=== jq_team_names ===
"Platform"
"AI"
"Growth"
"SRE"
=== pipe_sort_uniq_wc ===
86
=== md5_json ===
f249ee110320adc2975cb6c7436c9a45  /onedrive/data/example.json
=== sha256_json ===
ca04d1f4b6a5f1a774fb076af00a791e7f7ef70958300e314c4eafc563ac3bb9  /onedrive/data/example.json
=== ls_l_data ===
-rw-r--r-- 1 user user     2514 Mar 31 00:00 example.feather
-rw-r--r-- 1 user user    15533 Mar 31 00:00 example.json
-rw-r--r-- 1 user user 10414430 Mar 31 00:00 example.jsonl
-rw-r--r-- 1 user user      631 Mar 31 00:00 example.orc
-rw-r--r-- 1 user user     2401 Mar 31 00:00 example.parquet
=== ls_l_root ===
drwxr-xr-x 1 user user 10435509 Mar 31 00:00 data
=== file_parquet ===
parquet, 10 rows, 3 columns (id: int64, value: float64, label: string)
=== file_orc ===
orc, 10 rows, 3 columns, 1 stripes (id: int64, value: float64, label: string)
=== file_feather ===
feather, 10 rows, 3 columns (id: int64, value: float64, label: string)
=== du_multi ===
15533	/onedrive/data/example.json
10414430	/onedrive/data/example.jsonl
=== file_multi ===
/onedrive/data/example.json: json
/onedrive/data/example.jsonl: json
=== safeguard_cat_truncates ===
{"type":"queue-operation","operation":"enqueue","timestamp":"2026-03-17T13:35:35.319Z","sessionId":"664396f7-55a4-4604-8289-aa7142480db4"}
{"type":"queue-operation","operation":"dequeue","timestamp":"2026-03-17T13:35:35.320Z","sessionId":"664396f7-55a4-4604-8289-aa7142480db4"}
{"type":"file-history-snapshot","messageId":"8e465ae4-600a-4e71-9425-e0624a8fd615","snapshot":{"messageId":"8e465ae4-600a-4e71-9425-e0624a8fd615","trackedFileBackups":{},"timestamp":"2026-03-17T13:35:35.326Z"},"isSnapshotUpdate":false}
{"parentUuid":null,"isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","type":"progress","data":{"type":"hook_progress","hookEvent":"SessionStart","hookName":"SessionStart:startup","command":"\"${CLAUDE_PLUGIN_ROOT}/hooks/run-hook.cmd\" session-start.sh"},"parentToolUseID":"9d685ae2-8848-4dde-a24e-f72554f705e8","toolUseID":"9d685ae2-8848-4dde-a24e-f72554f705e8","timestamp":"2026-03-17T13:34:27.072Z","uuid":"45a63bc8-223d-4468-9973-66da8230f8de"}
{"parentUuid":"45a63bc8-223d-4468-9973-66da8230f8de","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","type":"user","message":{"role":"user","content":[{"type":"text","text":"Ok now let's refactor the mirage/backends\n\nlet's group similar backend together to same subfolder\n\nfor example s3 and r2 are object storage (maybe a better name) etc.\n\nand loader etc we should put to another folder etc\n\nlet's brainstorm and do the refactoring and renaming and new subfolders"}]},"uuid":"8e465ae4-600a-4e71-9425-e0624a8fd615","timestamp":"2026-03-17T13:35:35.325Z","permissionMode":"default"}
{"parentUuid":"8e465ae4-600a-4e71-9425-e0624a8fd615","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","message":{"model":"claude-opus-4-6","id":"msg_01UQCtE3bLbg85yGsyHAyur5","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"The user wants to refactor the mirage/backends directory by grouping similar backends into subfolders. They want to brainstorm first. Let me invoke the brainstorming skill as required.","signature":"EuECCkYICxgCKkAKyWyN/F3hZxKLOD9lNB72rlmx21lBX0HBj4fFoN304wbAYMe0rkeCNjI7W7sEtaTeGCrMVE8gN9u4ry5t8RR0EgyaUbaUKd+2Fumo1aMaDDBawTPuSp5XkDOAISIwnQ6Cb/Br73tJxiasoUgnJzfBqwfBSLoqoggZKKfIq+Vq2d50g83tmikDsD2K+tuaKsgB74kZQGhXIZuIudeWq+24h1NxVP7vQcyklga8wzvSo+/Mi2OjT++y7urRkZ9zT1Fn34/HdLR3T3L0IXcpQiwwswzjyLbzl2BYvYYYlZcPbyHjZOt6SaYX2GzAO4NyucJJPbKdROKP4Bbi8lKccVw9FHv0L8DXxaMAH/3DaHp73m/pjoqtlypq1xigxP7tCsSqmiv1OuskjK7lUvt6jtx741MGo4lDZ7aawNpBQp8ywyPof/eSqm/3ZtEJ17ar260tQjV5VUgjCdMYAQ=="}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":3901,"cache_read_input_tokens":19317,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3901},"output_tokens":12,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZ8jv4bF4iY8jNGNSF3wf","type":"assistant","uuid":"0adf62e8-ae65-40b4-99fa-a0261bf6cdfe","timestamp":"2026-03-17T13:35:40.841Z"}
{"parentUuid":"0adf62e8-ae65-40b4-99fa-a0261bf6cdfe","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","message":{"model":"claude-opus-4-6","id":"msg_01UQCtE3bLbg85yGsyHAyur5","type":"message","role":"assistant","content":[{"type":"text","text":"Using the brainstorming skill to explore the refactoring approach before implementation."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":3901,"cache_read_input_tokens":19317,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3901},"output_tokens":12,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZ8jv4bF4iY8jNGNSF3wf","type":"assistant","uuid":"2b14a3a0-0e7d-4387-b65b-da7f35794514","timestamp":"2026-03-17T13:35:41.636Z"}
{"parentUuid":"2b14a3a0-0e7d-4387-b65b-da7f35794514","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","message":{"model":"claude-opus-4-6","id":"msg_01UQCtE3bLbg85yGsyHAyur5","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01TzGxu5YJrZe6x4k6kEbf8h","name":"Skill","input":{"skill":"superpowers:brainstorming"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":3901,"cache_read_input_tokens":19317,"output_tokens":135,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3901,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZ8jv4bF4iY8jNGNSF3wf","type":"assistant","uuid":"1125f219-43db-47f9-a43e-b2d31ff1745e","timestamp":"2026-03-17T13:35:41.717Z"}
{"parentUuid":"1125f219-43db-47f9-a43e-b2d31ff1745e","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","type":"user","message":{"role":"user","content":[{"type":"tool_result","tool_use_id":"toolu_01TzGxu5YJrZe6x4k6kEbf8h","content":"Launching skill: superpowers:brainstorming"}]},"uuid":"0f0a0116-096c-42c7-9d5f-7f66d9c853b2","timestamp":"2026-03-17T13:35:41.726Z","toolUseResult":{"success":true,"commandName":"superpowers:brainstorming"},"sourceToolAssistantUUID":"1125f219-43db-47f9-a43e-b2d31ff1745e"}
{"parentUuid":"0f0a0116-096c-42c7-9d5f-7f66d9c853b2","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","type":"user","message":{"role":"user","content":[{"type":"text","text":"Base directory for this skill: /Users/agent/.claude/plugins/cache/superpowers-marketplace/superpowers/4.0.3/skills/brainstorming\n\n# Brainstorming Ideas Into Designs\n\n## Overview\n\nHelp turn ideas into fully formed designs and specs through natural collaborative dialogue.\n\nStart by understanding the current project context, then ask questions one at a time to refine the idea. Once you understand what you're building, present the design in small sections (200-300 words), checking after each section whether it looks right so far.\n\n## The Process\n\n**Understanding the idea:**\n- Check out the current project state first (files, docs, recent commits)\n- Ask questions one at a time to refine the idea\n- Prefer multiple choice questions when possible, but open-ended is fine too\n- Only one question per message - if a topic needs more exploration, break it into multiple questions\n- Focus on understanding: purpose, constraints, success criteria\n\n**Exploring approaches:**\n- Propose 2-3 different approaches with trade-offs\n- Present options conversationally with your recommendation and reasoning\n- Lead with your recommended option and explain why\n\n**Presenting the design:**\n- Once you believe you understand what you're building, present the design\n- Break it into sections of 200-300 words\n- Ask after each section whether it looks right so far\n- Cover: architecture, components, data flow, error handling, testing\n- Be ready to go back and clarify if something doesn't make sense\n\n## After the Design\n\n**Documentation:**\n- Write the validated design to `docs/plans/YYYY-MM-DD-<topic>-design.md`\n- Use elements-of-style:writing-clearly-and-concisely skill if available\n- Commit the design document to git\n\n**Implementation (if continuing):**\n- Ask: \"Ready to set up for implementation?\"\n- Use superpowers:using-git-worktrees to create isolated workspace\n- Use superpowers:writing-plans to create detailed implementation plan\n\n## Key Principles\n\n- **One question at a time** - Don't overwhelm with multiple questions\n- **Multiple choice preferred** - Easier to answer than open-ended when possible\n- **YAGNI ruthlessly** - Remove unnecessary features from all designs\n- **Explore alternatives** - Always propose 2-3 approaches before settling\n- **Incremental validation** - Present design in sections, validate each\n- **Be flexible** - Go back and clarify when something doesn't make sense\n"}]},"isMeta":true,"uuid":"2de0b21e-7b25-487d-a950-f40318f57f68","timestamp":"2026-03-17T13:35:41.726Z","sourceToolUseID":"toolu_01TzGxu5YJrZe6x4k6kEbf8h"}
{"parentUuid":"2de0b21e-7b25-487d-a950-f40318f57f68","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","message":{"model":"claude-opus-4-6","id":"msg_01VbUKtEhNc9JLWGeCDwCTsX","type":"message","role":"assistant","content":[{"type":"text","text":"\n\nLet me start by understanding the current state of the backends directory."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":726,"cache_read_input_tokens":23218,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":726},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZ8jvXuZ4YEqTECUmvQXp","type":"assistant","uuid":"b0087718-36b3-417f-85a3-075d2eef11f7","timestamp":"2026-03-17T13:35:45.193Z"}
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{"parentUuid":"62477442-4b37-465a-a94c-725c53c907eb","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","slug":"shimmering-leaping-wozniak","message":{"model":"claude-opus-4-6","id":"msg_014HZPE1Z2kLSP416wRLoQRd","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_011PXBdSPmWmhgMtapfqcJAd","name":"Agent","input":{"subagent_type":"Explore","description":"Explore all backend files","prompt":"Read all the backend files in mirage/backends/ to understand what each one does and what classes/interfaces they expose. Read: base.py, loader.py, r2.py, s3.py, proxy.py, http.py, local.py, memory.py, __init__.py. For each file, tell me: the main class name, what it inherits from, and a brief description of what it does. Also check what imports reference these backends from other parts of the codebase (grep for \"from mirage.backends\" and \"import mirage.backends\").","model":"haiku"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":229,"cache_creation_input_tokens":582,"cache_read_input_tokens":23944,"output_tokens":237,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":582,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZ8jvv6YR1F6dTLES1f1R","type":"assistant","uuid":"5ca16792-7671-4388-a2f4-9d389b035ca4","timestamp":"2026-03-17T13:35:54.853Z"}
{"parentUuid":"5ca16792-7671-4388-a2f4-9d389b035ca4","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","slug":"shimmering-leaping-wozniak","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_011PXBdSPmWmhgMtapfqcJAd","type":"tool_result","content":[{"type":"text","text":"Perfect! Now I have all the information needed. Let me compile a comprehensive report:\n\n## Backend Files Summary\n\nHere's a comprehensive breakdown of each backend file in `/Users/agent/strukto/mirage/mirage/backends/`:\n\n### 1. **base.py** - BaseBackend\n- **Main Class:** `BaseBackend`\n- **Inherits from:** None (base class)\n- **Description:** Abstract base class that defines the interface for all backends. Contains required operations (read, readdir, stat, open, release, write, create, unlink, rmdir, mkdir, rename, truncate) that subclasses must implement. Also provides helper methods built from those primitives (cat, ls, ls_l, grep, head, tail, presign, put).\n\n### 2. **memory.py** - MemoryBackend\n- **Main Class:** `MemoryBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** In-memory backend using plain Python dicts. No external dependencies. Stores file content in `_files` dict and tracks directories in `_dirs` set. Useful for tests, ephemeral scratch space, and caching. Also contains `_guess_type()` helper function to infer file types from extensions.\n\n### 3. **local.py** - LocalBackend\n- **Main Class:** `LocalBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** Filesystem backend using pathlib/os. Maps virtual paths to local filesystem paths relative to a root directory. No external dependencies. Prevents path traversal outside root directory.\n\n### 4. **s3.py** - S3Backend\n- **Main Class:** `S3Backend`\n- **Inherits from:** `BaseBackend`\n- **Description:** S3-compatible backend using boto3. Requires optional dependency. Implements optimized operations like S3 Select for grep/head on large files, batch ls_l using list_objects_v2, and presigned URLs. Key design: uses Range headers for partial reads, full PutObject for writes (S3 has no partial write).\n\n### 5. **r2.py** - R2Backend\n- **Main Class:** `R2Backend`\n- **Inherits from:** `S3Backend`\n- **Description:** Cloudflare R2 backend that extends S3Backend. Auto-computes the endpoint URL from account_id. Disables S3 Select (R2 doesn't support SelectObjectContent). Requires optional dependency.\n\n### 6. **http.py** - HTTPBackend\n- **Main Class:** `HTTPBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** Read-only HTTP backend using httpx. Maps virtual paths to HTTP URLs. Requires optional dependency. Requires user-supplied `readdir_fn` callback since HTTP has no standard directory listing protocol. All write operations raise NotImplementedError.\n\n### 7. **proxy.py** - ProxyBackend\n- **Main Class:** `ProxyBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** Remote proxy backend that delegates operations to a remote mirage server via HTTP. Uses base64-encoded data in JSON payloads for read/write. Does not support open/release operations.\n\n### 8. **loader.py** - Utility Module (not a backend)\n- **Main Function:** `load_backend_class(spec: str)`\n- **Description:** Dynamically loads backend classes from either file paths (e.g., \"./my_backend.py:MyClass\") or module dotpaths (e.g., \"mypackage.backends:MyClass\"). Used for custom backend plugins.\n\n### 9. **__init__.py** - Package Initialization\n- **Exports:** BaseBackend, LocalBackend, MemoryBackend, ProxyBackend (eagerly imported)\n- **Lazy Imports:** S3Backend, R2Backend, HTTPBackend are mentioned as lazily imported to avoid hard dependencies\n\n---\n\n## Import Usage Throughout Codebase\n\nThe backends are imported in these key locations:\n\n### Core Framework Files:\n- **mirage/workspace/mount.py** - Imports `BaseBackend`\n- **mirage/workspace/__init__.py** - Imports `BaseBackend` and `_guess_type` helper\n- **mirage/cli/config.py** - Imports all backends conditionally (lazy imports for S3, R2, HTTP)\n- **mirage/cli/commands/workspace.py** - Imports `load_backend_class` and `ProxyBackend`\n- **mirage/cli/commands/command.py** - Imports `load_backend_class`\n- **mirage/runtime/local.py** - Imports `LocalBackend`\n- **mirage/runtime/remote.py** - Imports `ProxyBackend`\n- **mirage/workspace/cache/policy.py** - Imports `BaseBackend`\n- **mirage/workspace/sync.py** - Imports `BaseBackend`\n- **mirage/server/service/local.py** - Imports `load_backend_class`\n- **mirage/__init__.py** - Exports `LocalBackend` and `MemoryBackend` at package level\n\n### Test Files:\n- Extensive use in tests for MemoryBackend (test fixtures), LocalBackend (filesystem tests), and ProxyBackend (remote tests)\n- Tests include: test_local.py, test_proxy.py, test_loader.py, test_configs.py\n\n### Examples:\n- examples/r2.py - Uses R2Backend\n- examples/claude-memory.py, examples/claude-sdk.py - Use MemoryBackend"},{"type":"text","text":"agentId: ab90e4dc934b387be (for resuming to continue this agent's work if needed)\n<usage>total_tokens: 31005\ntool_uses: 14\nduration_ms: 31609</usage>"}]}]},"uuid":"0b8c2f11-a95e-4f26-a048-5933634c0167","timestamp":"2026-03-17T13:36:26.464Z","toolUseResult":{"status":"completed","prompt":"Read all the backend files in mirage/backends/ to understand what each one does and what classes/interfaces they expose. Read: base.py, loader.py, r2.py, s3.py, proxy.py, http.py, local.py, memory.py, __init__.py. For each file, tell me: the main class name, what it inherits from, and a brief description of what it does. Also check what imports reference these backends from other parts of the codebase (grep for \"from mirage.backends\" and \"import mirage.backends\").","agentId":"ab90e4dc934b387be","content":[{"type":"text","text":"Perfect! Now I have all the information needed. Let me compile a comprehensive report:\n\n## Backend Files Summary\n\nHere's a comprehensive breakdown of each backend file in `/Users/agent/strukto/mirage/mirage/backends/`:\n\n### 1. **base.py** - BaseBackend\n- **Main Class:** `BaseBackend`\n- **Inherits from:** None (base class)\n- **Description:** Abstract base class that defines the interface for all backends. Contains required operations (read, readdir, stat, open, release, write, create, unlink, rmdir, mkdir, rename, truncate) that subclasses must implement. Also provides helper methods built from those primitives (cat, ls, ls_l, grep, head, tail, presign, put).\n\n### 2. **memory.py** - MemoryBackend\n- **Main Class:** `MemoryBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** In-memory backend using plain Python dicts. No external dependencies. Stores file content in `_files` dict and tracks directories in `_dirs` set. Useful for tests, ephemeral scratch space, and caching. Also contains `_guess_type()` helper function to infer file types from extensions.\n\n### 3. **local.py** - LocalBackend\n- **Main Class:** `LocalBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** Filesystem backend using pathlib/os. Maps virtual paths to local filesystem paths relative to a root directory. No external dependencies. Prevents path traversal outside root directory.\n\n### 4. **s3.py** - S3Backend\n- **Main Class:** `S3Backend`\n- **Inherits from:** `BaseBackend`\n- **Description:** S3-compatible backend using boto3. Requires optional dependency. Implements optimized operations like S3 Select for grep/head on large files, batch ls_l using list_objects_v2, and presigned URLs. Key design: uses Range headers for partial reads, full PutObject for writes (S3 has no partial write).\n\n### 5. **r2.py** - R2Backend\n- **Main Class:** `R2Backend`\n- **Inherits from:** `S3Backend`\n- **Description:** Cloudflare R2 backend that extends S3Backend. Auto-computes the endpoint URL from account_id. Disables S3 Select (R2 doesn't support SelectObjectContent). Requires optional dependency.\n\n### 6. **http.py** - HTTPBackend\n- **Main Class:** `HTTPBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** Read-only HTTP backend using httpx. Maps virtual paths to HTTP URLs. Requires optional dependency. Requires user-supplied `readdir_fn` callback since HTTP has no standard directory listing protocol. All write operations raise NotImplementedError.\n\n### 7. **proxy.py** - ProxyBackend\n- **Main Class:** `ProxyBackend`\n- **Inherits from:** `BaseBackend`\n- **Description:** Remote proxy backend that delegates operations to a remote mirage server via HTTP. Uses base64-encoded data in JSON payloads for read/write. Does not support open/release operations.\n\n### 8. **loader.py** - Utility Module (not a backend)\n- **Main Function:** `load_backend_class(spec: str)`\n- **Description:** Dynamically loads backend classes from either file paths (e.g., \"./my_backend.py:MyClass\") or module dotpaths (e.g., \"mypackage.backends:MyClass\"). Used for custom backend plugins.\n\n### 9. **__init__.py** - Package Initialization\n- **Exports:** BaseBackend, LocalBackend, MemoryBackend, ProxyBackend (eagerly imported)\n- **Lazy Imports:** S3Backend, R2Backend, HTTPBackend are mentioned as lazily imported to avoid hard dependencies\n\n---\n\n## Import Usage Throughout Codebase\n\nThe backends are imported in these key locations:\n\n### Core Framework Files:\n- **mirage/workspace/mount.py** - Imports `BaseBackend`\n- **mirage/workspace/__init__.py** - Imports `BaseBackend` and `_guess_type` helper\n- **mirage/cli/config.py** - Imports all backends conditionally (lazy imports for S3, R2, HTTP)\n- **mirage/cli/commands/workspace.py** - Imports `load_backend_class` and `ProxyBackend`\n- **mirage/cli/commands/command.py** - Imports `load_backend_class`\n- **mirage/runtime/local.py** - Imports `LocalBackend`\n- **mirage/runtime/remote.py** - Imports `ProxyBackend`\n- **mirage/workspace/cache/policy.py** - Imports `BaseBackend`\n- **mirage/workspace/sync.py** - Imports `BaseBackend`\n- **mirage/server/service/local.py** - Imports `load_backend_class`\n- **mirage/__init__.py** - Exports `LocalBackend` and `MemoryBackend` at package level\n\n### Test Files:\n- Extensive use in tests for MemoryBackend (test fixtures), LocalBackend (filesystem tests), and ProxyBackend (remote tests)\n- Tests include: test_local.py, test_proxy.py, test_loader.py, test_configs.py\n\n### Examples:\n- examples/r2.py - Uses R2Backend\n- examples/claude-memory.py, examples/claude-sdk.py - Use MemoryBackend"}],"totalDurationMs":31609,"totalTokens":31005,"totalToolUseCount":14,"usage":{"input_tokens":3,"cache_creation_input_tokens":1982,"cache_read_input_tokens":27692,"output_tokens":1328,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":1982},"inference_geo":"","iterations":[],"speed":"standard"}},"sourceToolAssistantUUID":"5ca16792-7671-4388-a2f4-9d389b035ca4"}
{"parentUuid":"0b8c2f11-a95e-4f26-a048-5933634c0167","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","slug":"shimmering-leaping-wozniak","message":{"model":"claude-opus-4-6","id":"msg_014sYGXwwkZzDaH5Gip8uWmm","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"Now I have a good understanding of all the backends. Let me think about the grouping:\n\n1. **base.py** - Base class, should stay at the top level\n2. **memory.py** - In-memory storage\n3. **local.py** - Local filesystem storage\n4. **s3.py** - S3 object storage\n5. **r2.py** - R2 object storage (extends S3)\n6. **http.py** - Read-only HTTP backend\n7. **proxy.py** - Remote proxy backend\n8. **loader.py** - Utility for loading backends\n\nPossible groupings:\n\n\n- **Object storage**: s3.py, r2.py (cloud object storage)\n- **Local storage**: local.py, memory.py (local/in-process storage)\n- **Network/Remote**: http.py, proxy.py (network-based backends)\n- **Core**: base.py, loader.py (foundational stuff)\n\nOr I could organize it with base.py and loader.py at the top level, then create subdirectories for object_storage (s3.py, r2.py), local (local.py, memory.py), and network (http.py, proxy.py).\n\nI should ask the user which structure they prefer before moving forward.","signature":"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"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1856,"cache_read_input_tokens":24526,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1856},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZ8jyq2XgkEjE9nZmEEDq","type":"assistant","uuid":"fa142d5e-7c0e-46f1-9f69-b46c31dde36d","timestamp":"2026-03-17T13:36:38.517Z"}
{"parentUuid":"fa142d5e-7c0e-46f1-9f69-b46c31dde36d","isSidechain":false,"userType":"external","cwd":"/Users/agent/strukto/mirage","sessionId":"664396f7-55a4-4604-8289-aa7142480db4","version":"2.1.63","gitBranch":"main","slug":"shimmering-leaping-wozniak","message":{"model":"claude-opus-4-6","id":"msg_014sYGXwwkZzDaH5Gip8uWmm","type":"message","role":"assistant","content":[{"type":"text","text":"Good, I've got a clear picture of all 8 backends. Here's what we're working with:\n\n| File | Class | Description |\n|------|-------|-------------|\n| `base.py` | `BaseBackend` | Abstract base class |\n| `memory.py` | `MemoryBackend` | In-memory dict storage |\n| `local.py` | `LocalBackend` | Local filesystem |\n| `s3.py` | `S3Backend` | AWS S3 via boto3 |\n| `r2.py` | `R2Backend` (extends S3) | Cloudflare R2 |\n| `http.py` | `HTTPBackend` | Read-only HTTP |\n| `proxy.py` | `ProxyBackend` | Remote mirage server proxy |\n| `loader.py` | `load_backend_class()` | Dynamic class loader utility |\n\nI see three natural groupings:\n\n1. **Object storage** — `s3.py`, `r2.py` (cloud object stores, R2 even inherits from S3)\n2. **Local** — `local.py`, `memory.py` (in-process, no network)\n3. **Network** — `http.py`, `proxy.py` (remote access over HTTP)\n\nThen `base.py` and `loader.py` stay at the top level as foundational pieces.\n\nDoes this grouping feel right, or would you organize them differently? For instance, should `memory.py` be in its own category since it's more of a \"virtual\" backend, or is grouping it with `local.py` fine?"}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1856,"cache_read_input_tokens":24526,"output_tokens":708,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1856,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZ8jyq2XgkEjE9nZmEEDq","type":"assistant","uuid":"6ac95b48-d2be-4f49-b3b0-7a969d2c9f34","timestamp":"2026-03-17T13:36:42.113Z"}
{"type":"queue-operation","operation":"enqueue","timestamp":"2026-03-17T13:36:56.553Z","sessionId":"664396f7-55a4-4604-8289-aa7142480db4"}
output truncated at safeguard limit (20 lines); narrow with grep, or read more with head -n / tail -n / a more specific path
=== safeguard_cat_pipe_uncapped ===
5766
=== stream:head_c100 ===
bytes=8192 lines=1 out0='{"type":"queue-operation","operation":"enqueue",'
=== stream:head_n1 ===
bytes=8192 lines=1 out0='{"type":"queue-operation","operation":"enqueue",'
=== stream:grep_m1 ===
bytes=8192 lines=1 out0='{"parentUuid":null,"isSidechain":false,"userType'
=== stream:cat_wc_full ===
bytes=10414430 lines=1 out0='5766'
=== calls:ls_l ===
children=1 item=0
=== warm:warm_cat ===
downloads_before=1 downloads_after=1 served_from_cache=True
=== warm:warm_grep ===
downloads_before=1 downloads_after=1 served_from_cache=True
=== warm:warm_head ===
downloads_before=1 downloads_after=1 served_from_cache=True
=== warm:warm_tail ===
downloads_before=1 downloads_after=1 served_from_cache=True
=== warm:warm_wc ===
downloads_before=1 downloads_after=1 served_from_cache=True
=== exit:grep_match ===
exit=0
=== exit:grep_no_match ===
exit=1
=== safeguard:timeout_sleep_fires ===
exit=124
sleep: timed out after 0.1s
=== nf_cat ===
exit=1
cat: /onedrive/__nf_missing__.txt: No such file or directory
=== nf_head ===
exit=1
head: /onedrive/__nf_missing__.txt: No such file or directory
=== nf_tail ===
exit=1
tail: /onedrive/__nf_missing__.txt: No such file or directory
=== nf_wc ===
exit=1
wc: /onedrive/__nf_missing__.txt: No such file or directory
=== nf_stat ===
exit=1
stat: /onedrive/__nf_missing__.txt: No such file or directory
=== nf_grep ===
exit=1
grep: /onedrive/__nf_missing__.txt: No such file or directory
=== prov_cache_write_through ===
net=0 write=0 cache=17 ops=1 hits=1 precision=exact
=== prov_cache_cold ===
net=17 write=0 cache=0 ops=1 hits=0 precision=exact
=== prov_cache_read_through ===
net=0 write=0 cache=17 ops=1 hits=1 precision=exact
=== prov_cache_partial ===
net=0 write=0 cache=29 ops=2 hits=1 precision=exact
=== prov_cache_cleared ===
net=17 write=0 cache=0 ops=1 hits=0 precision=exact
=== cachev_link_cold ===
bytes=13
=== cachev_link_warm ===
bytes=0
=== cachev_target_shares_entry ===
bytes=0
=== cachev_warm_grep ===
bytes=0
=== cachev_prov_link ===
net=0 write=0 cache=13 ops=1 hits=1 precision=exact
=== consistency:always:first ===
v1
=== consistency:always:second ===
v2
=== consistency:lazy:first ===
v1
=== consistency:lazy:second ===
v1
