Agent Context Isolation
- 494 installs
- 3.9k repo stars
- Updated January 26, 2026
- parcadei/continuous-claude-v3
agent-context-isolation is a Claude Code skill that prevents subagent transcripts from polluting the main context window by routing background agent output through file-based coordination for developers running long or m
About
agent-context-isolation is a Claude Code skill from parcadei/continuous-claude-v3 that keeps the primary context window clean during multi-agent work. It instructs agents to launch background Tasks with run_in_background=true, write results to files under .claude/cache/agents/<agent-type>/, and have the main session read those files instead of ingesting full subagent transcripts. The skill marks user-invocable as false because it applies as an always-on coordination rule. Developers reach for agent-context-isolation when parallel subagents, long-running reviews, or cross-project Claude sessions start exhausting context or mixing unrelated output.
- Prevents context bleed between unrelated tasks and projects
- Maintains strict separation of conversation histories and file scopes
- Reduces token waste from accumulated irrelevant context
- Enables safe parallel work on several agents or features
- Works automatically with Continuous Claude v3 workflows
Agent Context Isolation by the numbers
- 494 all-time installs (skills.sh)
- +2 installs in the week ending Aug 4, 2026 (Skillselion tracking)
- Ranked #1,785 of 16,546 AI & Agent Building skills by installs in the Skillselion catalog
- Data as of Aug 5, 2026 (Skillselion catalog sync)
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| Installs | 494 |
|---|---|
| repo stars | ★ 3.9k |
| Last updated | January 26, 2026 |
| Repository | parcadei/continuous-claude-v3 ↗ |
How do you isolate subagent output from main context?
Keep Claude's context clean and isolated across multiple projects or long-running sessions.
Who is it for?
Developers running multiple Claude Code background agents or long sessions who need structured handoffs without context bloat.
Skip if: Single-turn prompts or workflows where all agent output should remain inline in one conversation thread.
When should I use this skill?
Multiple subagents run in parallel, context windows fill with transcript noise, or cross-project Claude sessions need isolated result files.
What you get
File-based agent result artifacts under .claude/cache/agents/ and a clean main context window
- isolated agent result files
- clean main session context
Files
Agent Context Isolation
Prevent agent output from polluting the main context window.
Rules
1. Use Background Agents with File-Based Coordination
# RIGHT - background agent writes to file, main reads file
Task(subagent_type="...", run_in_background=true, prompt="... Output to: /path/to/file.md")
# WRONG - foreground agent dumps full transcript into main context
Task(subagent_type="...", run_in_background=false)Background agents with run_in_background=true isolate their context. Have them write results to files in .claude/cache/agents/<agent-type>/.
2. Never Use TaskOutput to Retrieve Results
# WRONG - dumps entire transcript (70k+ tokens) into context
TaskOutput(task_id="<id>")
TaskOutput(task_id="<id>", block=true)
# RIGHT - check expected output files
Bash("ls -la .claude/cache/agents/<agent-type>/")
Bash("bun test") # verify with testsTaskOutput returns the full agent transcript. Always use file-based coordination instead.
3. Monitor Agent Progress via System Reminders
# System reminders come automatically:
# "Agent a42a16e progress: 6 new tools used, 88914 new tokens"
# To detect completion:
# - Watch for progress reminders to stop arriving
# - Poll for expected output files: find .claude/cache/agents -name "*.md" -mmin -5
# - Check task output file size growth: wc -c /tmp/claude/.../tasks/<id>.outputStuck agent detection: 1. Progress reminders stop arriving 2. Task output file size stops growing 3. Expected output file not created after reasonable time
4. Verify with Tests, Not Output
After agent work: 1. Run the test suite directly: bun test 2. Report pass/fail counts 3. Only investigate failures if tests fail
5. File-Based Agent Pipeline Pattern
Research agent → .claude/cache/agents/oracle/output.md
↓
Plan agent → .claude/cache/agents/plan-agent/output.md (reads research)
↓
Validate agent → .claude/cache/agents/validate-agent/output.md (reads plan)
↓
Implement agent → src/module.ts (reads validated plan)Each agent reads the previous agent's file output, not TaskOutput.
Why This Matters
Agent context isolation preserves the main conversation's context budget. Reading agent outputs via TaskOutput floods context, causing:
- Mid-conversation compaction
- Lost context about user's original request
- Repeated explanations needed
Source
- Session where TaskOutput flooded 70k+ tokens into main context
- Session 2026-01-01: Successfully used background agents with file-based coordination for SDK Phase 3
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Pick agent-context-isolation when subagent noise is the bottleneck rather than general prompt engineering or memory persistence skills.
FAQ
Where should background agents write output per agent-context-isolation?
agent-context-isolation directs background agents to write results to files under .claude/cache/agents/<agent-type>/ so the main session reads files instead of ingesting full subagent transcripts.
Should foreground Tasks be used with agent-context-isolation?
agent-context-isolation discourages foreground Tasks that dump full transcripts into the main context. Use run_in_background=true and file-based coordination for isolation.