Add minimal problem schema + CI smoke set + schema warnings

[ootakazuhiko]

概要

• 最小の問題スキーマ（JSON Schema）を追加し、構造チェックを警告として実行
• CI 向けスモークセット を追加（CLI-001/WEB-001/NET-001）
• を追加（下流が参照可能）
• ワークフローに usage: jsonschema [-h] [-i INSTANCES] [-F ERROR_FORMAT] [-o {plain,pretty}]
  [-V VALIDATOR] [--base-uri BASE_URI] [--version]
  schema

JSON Schema Validation CLI

positional arguments:
schema the path to a JSON Schema to validate with (i.e.
schema.json)

options:
-h, --help show this help message and exit
-i INSTANCES, --instance INSTANCES
a path to a JSON instance (i.e. filename.json) to
validate (may be specified multiple times). If no
instances are provided via this option, one will be
expected on standard input.
-F ERROR_FORMAT, --error-format ERROR_FORMAT
the format to use for each validation error message,
specified in a form suitable for str.format. This
string will be passed one formatted object named
'error' for each ValidationError. Only provide this
option when using --output=plain, which is the
default. If this argument is unprovided and
--output=plain is used, a simple default
representation will be used.
-o {plain,pretty}, --output {plain,pretty}
an output format to use. 'plain' (default) will
produce minimal text with one line for each error,
while 'pretty' will produce more detailed human-
readable output on multiple lines.
-V VALIDATOR, --validator VALIDATOR
the fully qualified object name of a validator to use,
or, for validators that are registered with
jsonschema, simply the name of the class.
--base-uri BASE_URI a base URI to assign to the provided schema, even if
it does not declare one (via e.g. $id). This option
can be used if you wish to resolve relative references
to a particular URI (or local path)
--version show program's version number and exit を導入

方針

• 現段階では 構文エラーのみFail。スキーマ逸脱は警告にとどめ、段階的に強化します
• これにより既存の問題群に大きな破壊なく導入が可能

[Copilot]

Pull Request Overview

This PR introduces a minimal problem schema validation system with JSON Schema, adds CI smoke testing capabilities, and implements a gradual enforcement approach for schema compliance. The changes focus on establishing basic validation infrastructure while maintaining backward compatibility.

• Introduces minimal JSON Schema for problem structure validation with warning-based enforcement
• Adds CI smoke test set containing three core problems (CLI-001, WEB-001, NET-001) for quick validation
• Implements validation and index building scripts with graceful error handling

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
scripts/validate_yaml.py	Core validation script that checks YAML syntax and schema compliance with warnings
scripts/build_index.py	Generates problem index JSON for downstream consumption
problems/schema/problem.schema.json	Minimal JSON schema defining required problem structure
problems/expert/RTC-001.yaml	Resolves merge conflicts in WebRTC problem definition
docs/SMOKE-SET.md	Documentation for CI smoke test functionality
ci/smoke-set.yaml	Configuration file listing problems for smoke testing
.github/workflows/validate-problems.yml	CI workflow for automated problem validation and indexing

Comments suppressed due to low confidence (1)

problems/expert/RTC-001.yaml:1

• This file contains unresolved Git merge conflict markers. The conflict should be fully resolved by removing all merge markers and ensuring only one clean version of the content remains.

# Req2Run Problem: WebRTC Video Conferencing Server

---

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[Copilot]

Catching generic Exception is too broad. Should catch specific ImportError to match the pattern used for PyYAML import above.

Suggested change

	except Exception:
	except ImportError:

[Copilot]

Silent exception handling makes debugging difficult. Consider logging the error or at least catching specific exceptions like yaml.YAMLError or FileNotFoundError.

Suggested change

	except Exception:
	pass
	except yaml.YAMLError as e:
	print(f"YAML error in file {path}: {e}", file=sys.stderr)
	except FileNotFoundError as e:
	print(f"File not found: {path}: {e}", file=sys.stderr)
	except Exception as e:
	print(f"Error processing file {path}: {e}", file=sys.stderr)