Borrowing it
Nothing to install: this file belongs to xg-gh-25/SwarmAI. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/xg-gh-25/SwarmAI/main/.kiro/steering/multi-tab-isolation-principles.mdgit clone --depth 1 https://github.com/xg-gh-25/SwarmAIWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/xg-gh-25/swarmai/multi-tab-isolation-principles)<a href="https://agentmods.dev/instructions/xg-gh-25/swarmai/multi-tab-isolation-principles"><img src="https://agentmods.dev/badge/instructions/xg-gh-25/swarmai/multi-tab-isolation-principles/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/xg-gh-25/swarmai/multi-tab-isolation-principles"><img src="https://agentmods.dev/badge/instructions/xg-gh-25/swarmai/multi-tab-isolation-principles.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.02881 | $0.02881 |
| Opus 5.5 | $0.01152 | $0.01152 |
| Sonnet 5.5 | $0.00576 | $0.00576 |
| Haiku 4.5 | $0.00288 | $0.00288 |
Grade A, and why
SwarmAI multi-tab-isolation-principles.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Multi-Tab Chat Isolation Principles
Architecture Overview
Each chat tab is a standalone session with its own end-to-end lifecycle. Several tabs
(RAM-adaptive limit, see ResourceMonitor.compute_max_tabs()) process different tasks in
parallel. Tabs MUST NOT interfere with each other at any layer.
State Ownership Model
┌─────────────────────────────────────────────────────────────┐
│ MessageStore (messageStoreRegistry.get(tabId)) │
│ ════════════════════════════════════════════ │
│ SINGLE WRITER for a tab's messages. All message mutations │
│ go through the store (insertOptimisticMessages, append, │
│ updateLast, replace). tabState.messages is a fallback │
│ cache only. │
│ │
│ tabMapRef (useRef<Map<string, UnifiedTab>>) │
│ ════════════════════════════════════════════ │
│ AUTHORITATIVE for all other per-tab state: │
│ • sessionId, pendingQuestion, pendingPermissionRequestId │
│ • isStreaming (readonly; driven by the per-tab streaming │
│ state machine inside setIsStreaming), abortController, │
│ streamGen, userStopped │
│ • status (idle/streaming/permission_needed/error/etc.) │
│ │
│ React useState (messages, sessionId, isStreaming, etc.) │
│ ════════════════════════════════════════════ │
│ DISPLAY MIRROR — reflects ONLY the active tab's state. │
│ Updated on tab switch via restore + bumpStreamingDerivation│
│ │
│ pendingStreamTabs (useState<Set<string>>) │
│ ════════════════════════════════════════════ │
│ PENDING TRACKER — narrow: covers only the gap before a tab │
│ is registered as streaming. Keyed by tabId. Once the tab │
│ is registered, its own isStreaming flag is the only truth. │
└─────────────────────────────────────────────────────────────┘
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago Changed · +4 lines · -5 tokens per session scan C → A 94aeddcb9732
- 1mo ago First seen · 192 lines · 2,886 tokens per session scan C a5532a3483e7
SwarmAI multi-tab-isolation-principles.md is an instructions file published in the GitHub repository xg-gh-25/SwarmAI (55 stars, last pushed 8d ago), licensed MIT. It adds 2,881 tokens to every session, about $0.0115 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.
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