Yichen Jiang
03b534de16
$DSH_HOME/.env carried two incompatible jobs. As credentials-local's writable secret store it could not be hoisted into process.env — hoisting makes every stored key read as a read-only launch override and blocks rotation from the TUI and the web page. But its name and dotenv format promise an environment file, so a DEEPSEEK_BASE_URL sitting beside a working DEEPSEEK_API_KEY in the same file was silently ignored: only the credential provider read the document, and it addresses credential references alone. Split the two jobs into two files. .credentials.yaml is the provider-managed store: a strict YAML mapping of CredentialRef to non-empty string, no version field, no wrapper level. Because it holds credentials and nothing else, a non-mapping root, a non-identifier key, a non-string value, an empty string, a duplicate key, and malformed YAML are all rejections rather than skipped entries — loud at boot and at a write, warn-and-keep-last-good on a live reload. The dotenv physical-line editor gives way to a patch of the parsed document, so comments and untouched entries keep their formatting and any string value round-trips, multi-line included. Writer lock, read-modify-write, atomic 0600 write under a 0700 directory, watcher, self-write suppression, and quiescent disposal are unchanged. $DSH_HOME/.env becomes the user's ordinary environment layer. app-boot's new loadLayeredEnv loads the invoking directory's .env then the Harness home's, giving user < project < inherited; the home resolves from the inherited environment first, so a project .env cannot redirect it. Credential precedence is unchanged: the live environment still wins read-only over the file, and shadowed writes still reject. Whether a provider-managed store should instead win over the environment is a separate decision. No migration: a key already in $DSH_HOME/.env keeps resolving through the new environment layer, as a read-only env source that shadows the stored one.
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credentials/
English | 中文
凭据能力 seam，按三包形态的要求组织（接口／实现／消费方）：
| 包 | 角色 |
|---|---|
credentials/ |
抽象 ctx.credentials：品牌化 CredentialRef 引用、按操作 resolve、对 UI 安全的 describe、响亮失败的 set/unset，以及 credentials/updated 提交事件 |
credentials-local/ |
文件／环境 provider：活跃进程环境（只读、优先）叠加在 $DSH_HOME/.credentials.yaml（可写、保留注释的编辑、热重载）之上 |
配置文件携带的是对机密的引用（apiKeyEnv: DEEPSEEK_API_KEY），绝不携带机密本身：设置文档可以放心同步与渲染，轮换值不触碰任何配置。LLM 适配器是第一批消费方——它们每次模型请求解析一次引用，正因如此，片刻前存入的密钥无需重启任何组件即可作用于紧随其后的下一次请求。
seam 形状为 keyring、辅助命令与 KMS 后端的 provider 留有余地。