fix: add httpx to core dependencies (fixes #5)

[sumaiya1303]

Summary

Adds httpx>=0.25 to core dependencies in pyproject.toml.

Problem

src/python/banterhearts/demo_agent/agents/chimera_agent.py imports httpx
at line 8 unconditionally. However httpx was only listed under optional
extras (bench, safety, resolve) — not in core dependencies.

A bare pip install chimeraforge never installs httpx, causing the
quick_start.md demo to fail immediately on every clean install with:

ModuleNotFoundError: No module named 'httpx'

Fix

Added httpx>=0.25 to the core dependencies block in pyproject.toml.

Related

Fixes #5

[Sahil170595]

Thanks for digging into this, @sumaiya1303 — the root-cause write-up on #5 is genuinely good, and the instinct behind this change is right. Two things worth separating:

1. The #5 repro specifically. The reproduction installs deps with pip install -r requirements.txt, but that file is a comment-only stub — it just points at the pyproject.toml extras and installs nothing. So the demo fails because no deps get installed at all, not because httpx is missing from the package metadata — and adding httpx to [project.dependencies] wouldn't make that exact repro pass, since the stub never installs the package. The actual quick-start fix is in #8 (switches the doc to pip install -e ".[bench]", which pulls httpx, and corrects the placeholder clone URL).

2. httpx as a core dependency — you're right. A plain pip install chimeraforge should leave the network-facing commands usable (the model-agnostic resolver, suggest, measure, safety, bench), and httpx doesn't affect offline plan even when it's installed — so there's a solid case for it being core, exactly as you have it here. Offline install for inspection is a real workflow and shouldn't leave half the CLI unusable.

How to take it to the finish line: two related PRs are in flight worth a skim first — #7 reworks the optional-dependency groups (and adds clean "install the extra" errors instead of raw tracebacks), and #8 fixes the #5 quick-start repro plus a quality_tier bug (#4). The cleanest version of your change, layered on that, would be: keep httpx in [project.dependencies] (as you have it) and trim the now-redundant [resolve]/[safety] extras (they'd collapse to just httpx).

Would you like to take it there? Happy to help you rebase onto #7 so they don't collide, and we'll land it with your name on it. Either way — thanks for jumping in, and please keep them coming.