Obsilo

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Multi-agent & tasks ​

For complex work, a single agent conversation can get unwieldy. Obsilo handles this with sub-agents: child agents that take on specific parts of a larger task on their own. It also pulls actionable tasks out of conversations and turns them into trackable notes.

What are sub-agents? ​

A sub-agent is a separate agent instance spawned by the main agent. It gets its own conversation, its own mode, and its own tool access. The parent hands off a specific job, waits for the result, then carries on.

When sub-agents help ​

  • Research fan-out: search multiple topics in parallel instead of one after the other
  • Divide and conquer: break a large task into independent pieces
  • Mode isolation: run a read-only analysis in Ask mode while the parent works in Agent mode
  • Long tasks: keep the main conversation focused while a sub-agent handles a side errand

How new_task works ​

The agent spawns sub-agents through the new_task tool. You don't call this tool directly. The agent decides when delegation makes sense.

What the agent specifies ​

ParameterPurpose
ModeWhich mode the child agent runs in (Ask or Agent)
MessageThe specific task description for the child
ContextRelevant information passed from the parent conversation

Depth guard ​

Sub-agents can spawn their own sub-agents, but Obsilo enforces a maximum depth of 2 levels. This prevents runaway chains:

Main Agent (level 0)
  -> Sub-Agent A (level 1)
      -> Sub-Agent A1 (level 2, maximum depth, cannot spawn further)
  -> Sub-Agent B (level 1)

Parallel execution ​

Read-safe tools (searching, reading files, semantic search) run in parallel via Promise.all. A sub-agent researching three topics searches all three at once, not one after another.

You don't need to manage this

Sub-agent orchestration is automatic. Describe your goal and the agent decides whether to delegate. For example, "Research these 5 companies and create a comparison table" might spawn one sub-agent per company.

Practical examples ​

Research fan-out ​

Your prompt: "Compare the note-taking approaches described in my notes about Zettelkasten, PARA, and Johnny Decimal"

What happens:

  1. The main agent spawns 3 sub-agents, one for each system
  2. Each sub-agent searches and reads the relevant notes
  3. Results return to the parent agent
  4. The parent creates the comparison

Divide and conquer ​

Your prompt: "Reorganize my Projects/ folder. Group notes by status (active, completed, on hold) and create an index note"

What happens:

  1. A sub-agent analyzes all notes and classifies them by status
  2. The parent agent creates the folder structure and moves files
  3. A final sub-agent generates the index note with links

Task extraction ​

Obsilo watches for actionable items in agent responses. When the agent produces a list with unchecked checkboxes (- [ ]), the TaskExtractor picks them up automatically.

How it works ​

  1. The agent responds with tasks in its message (a project plan, action items)
  2. Obsilo detects the - [ ] items
  3. A TaskSelectionModal pops up so you can pick which tasks to save
  4. Selected tasks become individual notes in your vault

Task notes ​

Each extracted task becomes a note with structured frontmatter:

markdown
---
type: task
status: open
source: agent-conversation
created: 2026-03-31
---

# Review Q1 budget allocations

Compare actual spending against planned budget for each department.
Highlight any variance above 10%.

This plays nicely with your existing task management: Dataview queries, kanban boards, or any plugin that reads frontmatter.

Not just agent tasks

Task extraction works on any checklist the agent produces: project plans, follow-ups from meeting notes, research next steps. If the agent writes - [ ] items, you can capture them.

Tips for multi-agent work ​

  1. Be ambitious. Multi-step requests like "research, compare, and summarize" are exactly what sub-agents are good at.
  2. Provide scope. Mention specific folders, tags, or file names so sub-agents know where to look.
  3. Check the activity block. You can see each sub-agent's tool calls in the parent's activity view.
  4. Use task extraction. When the agent gives you a plan, let it create task notes so nothing falls through the cracks.
  5. Trust the depth limit. Two levels of sub-agents cover most real-world scenarios. If you need more, break the work into separate conversations.

Model quality matters

Sub-agents consume additional API calls. Each child agent has its own conversation with the model. Use a capable model (Claude Sonnet or better) for multi-agent tasks. Smaller models may struggle with delegation decisions.

Next steps ​