feat(mem0-agent): WS0+WS1 foundation - verified contract, config, client core

Encodes the platform contract validated against the live API:
- project_id/org_id pinned in request body (query params are ignored)
- latest_only=True enforced on every read
- metadata.type as the read-time taxonomy (categorization lags ~4h)
- NOT filters take a list; delete_all takes query params; fields repeated

Includes project config (write-gate instructions, 6 custom categories, decay),
verified filter recipes, circuit breaker, session-scoped state, keychain auth,
and identity/project resolution.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

integrations/mem0-agent/pyproject.toml

@@ -0,0 +1,29 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "mem0-agent"
+version = "0.1.0"
+description = "Coding-agent memory for Claude Code and friends, built on the Mem0 platform"
+readme = "README.md"
+requires-python = ">=3.10"
+license = { text = "Apache-2.0" }
+dependencies = []
+
+[project.optional-dependencies]
+keyring = ["keyring>=24"]
+dev = ["pytest>=8", "keyring>=24"]
+
+[project.scripts]
+mem0-agent = "mem0_agent.cli:main"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/mem0_agent"]
+
+[tool.ruff]
+line-length = 120
+target-version = "py310"
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]