StackSignal Issue #2 — The Agent Is the Center of Gravity
Preview Text: GPT-5.5 hits 88.7% on SWE-bench. The IDE is dead. The agent is the center of gravity.
Post Body (Markdown ready):
The Big Number: 88.7%. That's OpenAI's GPT-5.5 score on SWE-bench Verified — within striking distance of Claude Mythos Preview's 93.9% record. Better than the median human developer at fixing production bugs. The "AI-assisted coding" to "AI-led coding" gap just closed.
Deals That Matter:
Continuum (YC W26) — $4M seed for post-deployment agentic software. General Catalyst, YC. Validates AgentOps as investable at seed stage.
Factory — $15M Series A for AI-powered code review + security scanning that generates patches and submits PRs. "AI SRE as a service."
Moonshot AI — Rumored $300M+ Series B at $2.5B. 1T parameter MoE architecture powering agent backends.
Tool Drop:
OpenAI Codex CLI
/goalmode — Describe the outcome, the agent plans, executes, and reports back. 50K–200K tokens per goal ($2–8 on GPT-5.5). The "agent loop" (plan → execute → validate → iterate) is now a first-class feature.Claude Code Agent SDK credit pool goes live June 15. Separate quota for autonomous vs. interactive tasks.
Architecture Pattern: The Goal → Plan → Execute → Validate Loop. Most agent failures happen at validation. Skipping it to save tokens costs 40 hours of debugging. Don't skip validation.
Market Map Update: GPT-5.5 jumped +3 points on the Coding Agent Index — largest single-month improvement since launch. Steepest climber right now.
The Signal: The IDE is no longer the center of gravity. The agent is. Cursor 3 demoted the editor. Claude Code never had one. Codex /goal doesn't show code until it's done. What matters now: trust, rollback, cost control, auditability.
Build for the agent loop. Learn to delegate, not just autocomplete.
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