refactor: rename ChatGPT provider

.agents/skills/fetching-models-pricing/SKILL.md

@@ -10,11 +10,11 @@ Maintain the per-token rate cards in:
 | Provider | Table | Live catalog | Preferred rate source |
 |---|---|---|---|
 | Copilot | `packages/provider-copilot/src/pricing.ts` | Copilot `/models` | model vendor's first-party API |
-| Codex | `packages/provider-codex/src/pricing.ts` | authenticated `/codex/models` | OpenAI API pricing |
+| ChatGPT | `packages/provider-chatgpt/src/pricing.ts` | authenticated `/codex/models` | OpenAI API pricing |
 | Claude Code | `packages/provider-claude-code/src/pricing.ts` | authenticated Anthropic `/v1/models` | Anthropic API pricing |
 | Ollama | `packages/provider-ollama/src/pricing.ts` | `/api/tags` + `/api/show` | Ollama official standard rates; vendor/host valuation for other models |
 
-Copilot, Codex and Claude Code use API-equivalent valuation. Ollama uses its
+Copilot, ChatGPT and Claude Code use API-equivalent valuation. Ollama uses its
 published standard token rates for covered models and retains vendor/host
 valuation for other models. These are request estimates; account consumption
 from `/api/usage` includes Ollama billing adjustments such as off-peak discounts.
@@ -80,7 +80,7 @@ subset for a model.
    USD per million tokens. `tokenPricingEntry` and `tokenBasePricing` apply the
    existing `perMillionTokenRates` conversion, so their resulting `PriceVector`
    values are USD per base token. Do not divide manually or pass number literals.
-   Follow `packages/provider-codex/src/pricing.ts` for a complete production
+   Follow `packages/provider-chatgpt/src/pricing.ts` for a complete production
    example instead of copying a rate vector into this skill.
 
    `collectModelPricingIssues` in
@@ -138,7 +138,7 @@ ineligible.
   normalizes nothing itself.
 - Claude Code resolves pricing from the dated raw upstream id before catalog
   aliases are merged into public ids.
-- Codex and Ollama use the raw upstream slug directly.
+- ChatGPT and Ollama use the raw upstream slug directly.
 
 ## Source Cautions
 

.agents/skills/probing-prod-upstream/SKILL.md

@@ -21,7 +21,7 @@ and non-production fixtures only.
 refresh token and leave production holding an invalid predecessor, interrupting
 production token renewal. This is a production continuity constraint. Do not
 extract refresh tokens, invoke refresh endpoints, call automatic-refresh helpers
-(including `ensureCodexAccessToken` and `ensureClaudeCodeAccessToken`), or route
+(including `ensureChatGPTAccessToken` and `ensureClaudeCodeAccessToken`), or route
 through a gateway operation that may trigger renewal. For providers with
 refresh-token renewal, use the existing access token. If it is missing, expired,
 or rejected, stop probing that account and report the blocker; let production
@@ -110,7 +110,7 @@ Do not import a provider entrypoint that can renew tokens or persist state.
 
 - **Copilot:** follow [the Copilot access reference](references/copilot.md) for
   PAT exchange, token-advertised endpoints, and Copilot Chat headers.
-- **Codex / Claude Code:** use the selected account's persisted
+- **ChatGPT / Claude Code:** use the selected account's persisted
   `state_json.accounts[].accessToken.token` and its expiry. Read `fetch.ts` and
   the protocol transport for headers and endpoints; join the credential to the
   configured account identity. All refresh-token paths remain forbidden.

.github/workflows/verify.yaml

@@ -114,7 +114,7 @@ jobs:
           - name: lint (gateway)
             targets: packages/gateway
           - name: lint (other packages)
-            targets: eslint.config.ts vitest.config.ts packages/agent-setup packages/http packages/interceptor packages/platform packages/protocols packages/provider packages/provider-azure packages/provider-claude-code packages/provider-codex packages/provider-copilot packages/provider-custom packages/provider-ollama packages/proxy packages/test-utils packages/translate scripts tools
+            targets: eslint.config.ts vitest.config.ts packages/agent-setup packages/http packages/interceptor packages/platform packages/protocols packages/provider packages/provider-azure packages/provider-chatgpt packages/provider-claude-code packages/provider-copilot packages/provider-custom packages/provider-ollama packages/proxy packages/test-utils packages/translate scripts tools
     name: ${{ matrix.name }}
     steps:
       - name: Checkout

AGENTS.md

@@ -65,8 +65,8 @@
 | Package | `packages/protocols` | Defines protocol contracts. |
 | Package | `packages/provider` | Defines provider contracts. |
 | Package | `packages/provider-azure` | Integrates Azure OpenAI. |
+| Package | `packages/provider-chatgpt` | Integrates ChatGPT subscriptions. |
 | Package | `packages/provider-claude-code` | Integrates Claude Code subscriptions. |
-| Package | `packages/provider-codex` | Integrates OpenAI Codex subscriptions. |
 | Package | `packages/provider-copilot` | Integrates GitHub Copilot subscriptions. |
 | Package | `packages/provider-custom` | Integrates OpenAI-compatible providers. |
 | Package | `packages/provider-ollama` | Integrates Ollama. |