commit 68e70026cc43956957f6597475b0c0cdea48cfbf
Author: Returner_org <apavel72hd.kuba@outlook.com>
Date:   Sat Jun 27 22:44:07 2026 +0300

    Инициализировать проект elexam-core
    
    Добавлена базовая конфигурация проекта: pyproject.toml с hatchling и индексом Gitea,
    README с документацией модулей, .gitignore, .python-version и структура исходного кода.

diff --git a/.gitignore b/.gitignore
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index 0000000..4bfe207
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,336 @@
+### VisualStudioCode template
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### JetBrains template
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+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
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+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
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+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
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+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
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+# mpeltonen/sbt-idea plugin
+.idea_modules/
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+# JIRA plugin
+atlassian-ide-plugin.xml
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+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### VirtualEnv template
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+.Python
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
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+pyvenv.cfg
+.venv
+pip-selfcheck.json
+
+### Backup template
+*.bak
+*.gho
+*.ori
+*.orig
+*.tmp
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+# Swap
+[._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+Sessionx.vim
+
+# Temporary
+.netrwhist
+*~
+# Auto-generated tag files
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+[._]*.un~
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+*.py[cod]
+*$py.class
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+# C extensions
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+# Distribution / packaging
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+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
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+*.manifest
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+# Jupyter Notebook
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+# IPython
+profile_default/
+ipython_config.py
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+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
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+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
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+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
+.pdm-build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
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+# mypy
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+.dmypy.json
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+
+# Pyre type checker
+.pyre/
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+# pytype static type analyzer
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+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### SublimeText template
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+*.tmlanguage.cache
+*.tmPreferences.cache
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+# Workspace files are user-specific
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+# *.sublime-project
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+sftp-config-alt*.json
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+# Package control specific files
+Package Control.last-run
+Package Control.ca-list
+Package Control.ca-bundle
+Package Control.system-ca-bundle
+Package Control.cache/
+Package Control.ca-certs/
+Package Control.merged-ca-bundle
+Package Control.user-ca-bundle
+oscrypto-ca-bundle.crt
+bh_unicode_properties.cache
+
+# Sublime-github package stores a github token in this file
+# https://packagecontrol.io/packages/sublime-github
+GitHub.sublime-settings
+
diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..6324d40
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.14
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..13dea40
--- /dev/null
+++ b/README.md
@@ -0,0 +1,104 @@
+# elexam-core
+
+Общая библиотека платформы **Elexam** — единый источник правды для envelope ответа, trace_id, structlog, каталога ошибок, ULID и http-клиента. Все сервисы зависят от конкретной версии этой библиотеки, чтобы поведение было гарантированно одинаковым.
+
+---
+
+## Что внутри
+
+| Модуль | Назначение |
+|---|---|
+| `elexam_core.context` | `ContextVar[str]` для хранения `trace_id` в пределах async-запроса (async-safe). Используется остальными модулями внутри. |
+| `elexam_core.middleware` | `TraceMiddleware` для FastAPI/Starlette — генерирует `trace_id` (ULID) или подхватывает его из входящего заголовка `X-Trace-Id`, кладёт в `ContextVar`. |
+| `elexam_core.envelope` | `success()` / `error()` — сборка стандартного конверта ответа API с `trace_id`, `event`, `processed_at`. |
+| `elexam_core.errors` | `ErrorCode` — Enum-каталог кодов ошибок вида `exam.not_found`; `ERROR_META` — HTTP-статус и severity для каждого кода. |
+| `elexam_core.logging` | Настройка `structlog`: JSON в stdout, `trace_id` автоматически в каждой строке лога. |
+| `elexam_core.ulid` | Утилита генерации ULID — монотонный, URL-safe, лексикографически сортируемый идентификатор. Используется везде вместо UUID. |
+| `elexam_core.http_client` | `httpx`-обёртка для межсервисных вызовов: автоматически пробрасывает текущий `trace_id` из `ContextVar` в заголовок `X-Trace-Id` исходящего запроса. |
+
+---
+
+## Установка
+
+### Через uv с приватным Gitea PyPI-индексом
+
+Сначала добавь индекс в `pyproject.toml` своего сервиса (или убедись, что он уже объявлен):
+
+```toml
+[[tool.uv.index]]
+name = "elexam"
+url = "https://git.dregomor.ru/api/packages/Returner_org/pypi/simple"
+```
+
+Затем установи пакет:
+
+```bash
+uv add elexam-core==0.1.0
+```
+### Напрямую из git по тегу
+
+До того, как пакет залит в registry, или для точного закрепления на конкретном коммите:
+
+```bash
+uv add "elexam-core @ git+https://git.dregomor.ru/Returner_org/elexam-core.git@v0.1.0"
+```
+
+---
+
+## Быстрый пример
+
+```python
+from fastapi import FastAPI
+from fastapi.responses import JSONResponse
+import structlog
+
+import elexam_core.logging  # инициализирует structlog один раз при импорте
+
+from elexam_core.middleware import TraceMiddleware
+from elexam_core.envelope import success, error
+from elexam_core.errors import ErrorCode, ERROR_META
+
+app = FastAPI()
+app.add_middleware(TraceMiddleware)  # с этого момента trace_id есть в каждом запросе
+
+log = structlog.get_logger()
+
+
+@app.get("/exams/{exam_id}")
+async def get_exam(exam_id: str):
+    exam = None  # здесь был бы запрос к БД
+
+    if exam is None:
+        log.warning("exam not found", exam_id=exam_id)
+        # structlog выведет в stdout:
+        # {"level": "warning", "trace_id": "01J7XR...", "exam_id": "...", "event": "exam not found", ...}
+
+        meta = ERROR_META[ErrorCode.EXAM_NOT_FOUND]
+        return JSONResponse(
+            status_code=meta["http"],
+            content=error(
+                message="Экзамен не найден",
+                errors=[{"field": "exam_id", "code": ErrorCode.EXAM_NOT_FOUND}],
+                event_type="exam.get",
+            ),
+        )
+
+    return success(data=exam, event_type="exam.get")
+```
+
+Ответ при успехе:
+
+```json
+{
+  "status": "success",
+  "data": { "id": "01J7XR...", "title": "Математика" },
+  "message": "OK",
+  "errors": null,
+  "meta": null,
+  "trace_id": "01J7XRQP2E...",
+  "event": { "id": "01J7XRQP2F...", "type": "exam.get" },
+  "processed_at": "2026-06-27T12:34:56.789Z"
+}
+```
+
+Один и тот же `trace_id` попадает в заголовок `X-Trace-Id` ответа, в тело JSON, в каждую строку лога. Найти по нему всю цепочку запроса через все сервисы можно одним грепом по stdout.
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..0681d85
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,18 @@
+[project]
+name = "elexam-core"
+version = "0.1.0"
+description = "Общая библиотека платформы Elexam: envelope ответа, trace_id, structlog, каталог ошибок, ULID, http-клиент"
+readme = "README.md"
+requires-python = ">=3.14"
+dependencies = []
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/elexam_core"]
+
+[[tool.uv.index]]
+name = "elexam"
+url = "https://git.dregomor.ru/api/packages/Returner_org/pypi/simple"
diff --git a/src/.gitkeep b/src/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/src/elexam_core/.gitkeep b/src/elexam_core/.gitkeep
new file mode 100644
index 0000000..e69de29