docs: add missing CHANGELOG entry for examples model switch to claude-haiku-4.5

[Copilot]

Direct commit c99e97d ("Faster examples", 2026-02-20) switched non-streaming examples from gpt-5.2 to claude-haiku-4.5 but was never documented in the CHANGELOG.

Changes

• CHANGELOG.md: Added ### Changed entry under [Unreleased] noting that non-streaming examples now use claude-haiku-4.5 instead of gpt-5.2

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[docs] Update CHANGELOG for faster examples model switch</issue_title>
<issue_description>## Documentation Updates - 2026-02-20

This PR adds a missing CHANGELOG entry for the "Faster examples" commit pushed directly to main today.

Features Documented

• Example model switch from gpt-5.2 to claude-haiku-4.5 for non-streaming examples (direct push, not a PR)

Changes Made

• Updated CHANGELOG.md [Unreleased] ### Changed section to note that non-streaming examples now use claude-haiku-4.5 instead of gpt-5.2

Validation

• bb --config /dev/null script/validate_docs.clj passed (9 files, 0 warnings)

Context

Scanned merged PRs from 2026-02-19 to 2026-02-20:

• [docs] Update getting-started with permissions and :client-name #22 — [docs] Update getting-started with permissions and :client-name — already a docs PR, no further action needed
• feat: add :client-name to session config (upstream PR #510) #21 — feat: add :client-name to session config — already documented in API.md, CHANGELOG, and getting-started.md
• Fix permission denial keyword types and pin examples to gpt-5.2 #18 — Fix permission denial keyword types and pin examples to gpt-5.2 — already documented in CHANGELOG and API.md

The direct commit "Faster examples" (c99e97d, 2026-02-20T14:56:25Z) switched non-streaming examples to claude-haiku-4.5 for performance. This was not documented in the CHANGELOG.

Notes

All other documentation was already up to date from the merged PRs themselves.

Generated by Daily Documentation Updater

• expires on Feb 21, 2026, 3:05 PM UTC

---

[!NOTE]
This was originally intended as a pull request, but the git push operation failed.

Workflow Run: View run details and download patch artifact

The patch file is available in the agent-artifacts artifact in the workflow run linked above.

To apply the patch locally:

# Download the artifact from the workflow run https://github.com/copilot-community-sdk/copilot-sdk-clojure/actions/runs/22228916982
# (Use GitHub MCP tools if gh CLI is not available)
gh run download 22228916982 -n agent-artifacts

# The patch file will be at agent-artifacts/tmp/gh-aw/aw.patch after download
# Apply the patch
git am agent-artifacts/tmp/gh-aw/aw.patch

Show patch (31 lines)

From 42a631877c8f0e1fa925fdee293363c4303ed831 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Fri, 20 Feb 2026 15:01:51 +0000
Subject: [PATCH] docs: document example model switch to claude-haiku-4.5 in
 CHANGELOG

Add CHANGELOG entry for the 'Faster examples' commit that switched
non-streaming examples from gpt-5.2 to claude-haiku-4.5 for faster
and cheaper demonstrations.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1ceba3..ac540a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ All notable changes to this project will be documented in this file. This change
 
 ### Changed
 - MCP local server example now passes `:on-permission-request copilot/approve-all` (required for MCP tool execution under deny-by-default)
+- Examples now use `claude-haiku-4.5` as the default model for non-streaming queries (faster and cheaper for demonstrations); streaming examples retain `gpt-5.2`
 
 ### Fixed
 - Permission denial result `:kind` now consistently uses keywords (not strings) in default handler responses, matching specs and `approve-all` behavior
-- 
2.52.0

Comments on the Issue (you are @copilot in this section)

• Fixes [docs] Update CHANGELOG for faster examples model switch #23

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

Pull request overview

Adds a missing [Unreleased] CHANGELOG entry documenting the recent examples default-model change, so users can understand why example behavior/perf differs from prior versions.

Changes:

• Add an [Unreleased] → ### Changed bullet noting a switch in default model used by examples.