diff --git a/docs/development/OpenNexus生产化实施进度-2026-09-08.md b/docs/development/OpenNexus生产化实施进度-2026-09-08.md
index c137658..306648f 100644
--- a/docs/development/OpenNexus生产化实施进度-2026-09-08.md
+++ b/docs/development/OpenNexus生产化实施进度-2026-09-08.md
@@ -226,3 +226,11 @@ Core 的独立数据目录目前不等于已授权 Vault。Python 旧笔记写
 - 配置递归拒绝常用秘密字段；writeOnly / x-opennexus-secret 声明禁止持久化对应值，包括条件和组合分支，不能通过 anyOf 的另一个分支绕过。此规则对条件分支采取保守拒绝；秘密应由后续凭据 broker 提供，任意普通字符串不能被自动识别为秘密。
 - 测试覆盖嵌套类型、范围、未知属性、错误 schema、引用、深度/体积、秘密声明和组合绕过；安装入口拒绝秘密配置后事务表保持为空。26 项扩展回归通过，日志 `.build/extension-config-tests.log`。
 - 这不替代各扩展类型的完整运行配置契约、用户确认、在线信任与沙箱，也没有完成配置迁移/导入秘密的完整流程。整体生产化继续未完成。
+
+
+## 增量：社区在线信任复核入口
+
+- 新增 HTTPS Community 客户端，复核 source_id、原固定公钥/命名空间、键撤销、发行撤回及完整发行内容。重复版本、键替换、未知响应、非 200（含重定向）、离线均拒绝；不接受刷新时自动信任新键。每请求 15 秒、JSON 4 MiB、集合 4096 项上限。
+- Checked 凭据由客户端内部构造，绑定规范来源、完整发行摘要和公钥摘要，单调时钟 30 秒过期；不序列化持久保存。switch_online 限同源组，所有准备目录与配置检查后、写入事务前再次复核时效。
+- 受控真实 HTTP socket 测试覆盖正常、撤销、键替换、撤回、内容变化、重复版本、503、302 和过期；HTTP 仅测试内部替换 URL，公开构造器只允许 HTTPS。27 项扩展回归与 Clippy 全目标检查通过，日志 `.build/extension-trust-tests.log`。
+- 尚未取得真实 HTTPS Community 部署验收；固定键来源仍要求 Host 信任设置提供，尚无设置 UI/轮换确认和运行期撤销停止循环。底层 switch_prepared 仍是未接 IPC 的内部安装存储原语，正式入口应调用 switch_online；离线本地包需独立信任流程。不能据此开启扩展执行或通过 D-04。
diff --git a/frontend/src-tauri/src/extension_store.rs b/frontend/src-tauri/src/extension_store.rs
index 654b028..ede5b4e 100644
--- a/frontend/src-tauri/src/extension_store.rs
+++ b/frontend/src-tauri/src/extension_store.rs
@@ -264,6 +264,56 @@ impl ExtensionStore {
             _lock: lock,
         })
     }
+    /// Online installation gate. The source identity and staged signing key must
+    /// originate from Host trust settings; this never accepts a replacement key.
+    pub async fn switch_online(
+        &mut self,
+        operation: &str,
+        vault_id: &str,
+        source_id: &str,
+        changes: &[crate::extension_transaction::Change],
+    ) -> Result<crate::extension_transaction::Receipt> {
+        if changes.is_empty() || changes.len() > 200 {
+            return Err(HostError::new("EXTENSION_TRANSACTION_INVALID"));
+        }
+        let mut verified = Vec::new();
+        let mut origin = None;
+        for change in changes {
+            let (source, json, key): (String, String, Vec<u8>) = self.db.query_row(
+                "SELECT source,release,signer FROM versions WHERE package_key=?1",
+                [&change.target.package_key],
+                |r| Ok((r.get(0)?, r.get(1)?, r.get(2)?)),
+            )?;
+            if origin.as_ref().is_some_and(|s| s != &source) {
+                return Err(HostError::new("EXTENSION_SOURCE_INVALID"));
+            }
+            origin = Some(source.clone());
+            let release: Release = serde_json::from_str(&json)
+                .map_err(|_| HostError::new("EXTENSION_STORE_CORRUPT"))?;
+            let key: [u8; 32] = key
+                .try_into()
+                .map_err(|_| HostError::new("EXTENSION_STORE_CORRUPT"))?;
+            let client = crate::extension_trust::Client::new(&source)?;
+            let checked = client
+                .check(
+                    crate::extension_trust::Pin {
+                        source_id,
+                        key_id: &release.key_id,
+                        namespace: &release.namespace,
+                        public_key: &key,
+                    },
+                    &release,
+                )
+                .await?;
+            verified.push((checked, source, release, key));
+        }
+        self.switch_prepared_inner(operation, vault_id, changes, || {
+            for (checked, source, release, key) in &verified {
+                checked.matches(source, release, key)?;
+            }
+            Ok(())
+        })
+    }
     /// Atomically selects a prepared group after installer policy checks. This
     /// method does not stop processes, validate configuration schemas or issue permits.
     pub fn switch_prepared(
@@ -271,6 +321,15 @@ impl ExtensionStore {
         operation: &str,
         vault_id: &str,
         changes: &[crate::extension_transaction::Change],
+    ) -> Result<crate::extension_transaction::Receipt> {
+        self.switch_prepared_inner(operation, vault_id, changes, || Ok(()))
+    }
+    fn switch_prepared_inner(
+        &mut self,
+        operation: &str,
+        vault_id: &str,
+        changes: &[crate::extension_transaction::Change],
+        check_fresh: impl FnOnce() -> Result<()>,
     ) -> Result<crate::extension_transaction::Receipt> {
         use cap_fs_ext::DirExt;
         let vault = Uuid::parse_str(vault_id)
@@ -322,6 +381,7 @@ impl ExtensionStore {
                 return Err(HostError::new("EXTENSION_STORE_CORRUPT"));
             }
         }
+        check_fresh()?;
         crate::extension_transaction::switch(&mut self.db, operation, changes)
     }
     pub fn finish_installation(
diff --git a/frontend/src-tauri/src/extension_trust.rs b/frontend/src-tauri/src/extension_trust.rs
new file mode 100644
index 0000000..81cef12
--- /dev/null
+++ b/frontend/src-tauri/src/extension_trust.rs
@@ -0,0 +1,295 @@
+//! Fresh Community state checked against Host-pinned keys; never TOFU on refresh.
+use crate::{
+    extension_package::Release,
+    workspace::{hash, HostError, Result},
+};
+use base64::{engine::general_purpose::STANDARD, Engine};
+use serde::Deserialize;
+use serde_json::Value;
+use std::time::{Duration, Instant};
+
+pub struct Client {
+    source: reqwest::Url,
+    http: reqwest::Client,
+}
+pub struct Pin<'a> {
+    pub source_id: &'a str,
+    pub key_id: &'a str,
+    pub namespace: &'a str,
+    pub public_key: &'a [u8; 32],
+}
+pub struct Checked {
+    source: String,
+    release_hash: String,
+    key_hash: String,
+    checked_at: Instant,
+}
+impl Checked {
+    /// Monotonic freshness avoids a wall-clock rollback extending validity.
+    pub fn matches(&self, source: &str, release: &Release, key: &[u8; 32]) -> Result<()> {
+        if self.checked_at.elapsed() > Duration::from_secs(30) {
+            return Err(HostError::new("EXTENSION_TRUST_STALE"));
+        }
+        let url =
+            reqwest::Url::parse(source).map_err(|_| HostError::new("EXTENSION_SOURCE_INVALID"))?;
+        if url.as_str() != self.source
+            || hash(&serde_json::to_vec(release).unwrap()) != self.release_hash
+            || hash(key) != self.key_hash
+        {
+            return Err(HostError::new("EXTENSION_TRUST_CHANGED"));
+        }
+        Ok(())
+    }
+}
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct Key {
+    key_id: String,
+    namespace: String,
+    public_key: String,
+    revoked: bool,
+}
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct Source {
+    schema_version: u32,
+    source_id: String,
+    keys: Vec<Key>,
+}
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct Releases {
+    items: Vec<Value>,
+}
+fn unavailable() -> HostError {
+    HostError::new("EXTENSION_TRUST_UNAVAILABLE")
+}
+impl Client {
+    pub fn new(source: &str) -> Result<Self> {
+        let mut url =
+            reqwest::Url::parse(source).map_err(|_| HostError::new("EXTENSION_SOURCE_INVALID"))?;
+        if url.scheme() != "https"
+            || url.host_str().is_none()
+            || !url.username().is_empty()
+            || url.password().is_some()
+            || url.query().is_some()
+            || url.fragment().is_some()
+            || source.len() > 2048
+        {
+            return Err(HostError::new("EXTENSION_SOURCE_INVALID"));
+        }
+        let path = format!("{}/", url.path().trim_end_matches('/'));
+        url.set_path(&path);
+        let http = reqwest::Client::builder()
+            .redirect(reqwest::redirect::Policy::none())
+            .timeout(Duration::from_secs(15))
+            .build()
+            .map_err(|_| unavailable())?;
+        Ok(Self { source: url, http })
+    }
+    async fn json(&self, path: &str) -> Result<Value> {
+        let url = self.source.join(path).map_err(|_| unavailable())?;
+        let mut response = self
+            .http
+            .get(url)
+            .header("Cache-Control", "no-cache, no-store")
+            .send()
+            .await
+            .map_err(|_| unavailable())?;
+        if response.status() != reqwest::StatusCode::OK
+            || response
+                .content_length()
+                .is_some_and(|n| n > 4 * 1024 * 1024)
+        {
+            return Err(unavailable());
+        }
+        let mut bytes = Vec::new();
+        while let Some(chunk) = response.chunk().await.map_err(|_| unavailable())? {
+            if bytes.len() + chunk.len() > 4 * 1024 * 1024 {
+                return Err(unavailable());
+            }
+            bytes.extend_from_slice(&chunk);
+        }
+        serde_json::from_slice(&bytes).map_err(|_| unavailable())
+    }
+    pub async fn check(&self, pin: Pin<'_>, release: &Release) -> Result<Checked> {
+        release.validate()?;
+        let started = Instant::now();
+        let source: Source = serde_json::from_value(self.json("catalog/v1/sources").await?)
+            .map_err(|_| unavailable())?;
+        if source.schema_version != 1
+            || source.source_id != pin.source_id
+            || source.keys.len() > 4096
+        {
+            return Err(HostError::new("EXTENSION_TRUST_CHANGED"));
+        }
+        let matching: Vec<_> = source
+            .keys
+            .iter()
+            .filter(|k| k.key_id == pin.key_id)
+            .collect();
+        if matching.len() != 1 {
+            return Err(HostError::new("EXTENSION_TRUST_CHANGED"));
+        }
+        let key = matching[0];
+        if key.revoked {
+            return Err(HostError::new("EXTENSION_REVOKED"));
+        }
+        if key.namespace != pin.namespace
+            || release.namespace != pin.namespace
+            || release.key_id != pin.key_id
+            || STANDARD.decode(&key.public_key).ok().as_deref() != Some(pin.public_key.as_slice())
+        {
+            return Err(HostError::new("EXTENSION_TRUST_CHANGED"));
+        }
+        let list: Releases = serde_json::from_value(
+            self.json(&format!(
+                "catalog/v1/packages/{}/{}/releases",
+                release.namespace, release.package_id
+            ))
+            .await?,
+        )
+        .map_err(|_| unavailable())?;
+        if list.items.len() > 4096 {
+            return Err(unavailable());
+        }
+        let mut found = Vec::new();
+        for mut item in list.items {
+            if item.get("version").and_then(Value::as_str) != Some(release.version.as_str()) {
+                continue;
+            }
+            let map = item.as_object_mut().ok_or_else(unavailable)?;
+            let withdrawn = map
+                .remove("withdrawn")
+                .and_then(|v| v.as_bool())
+                .ok_or_else(unavailable)?;
+            if withdrawn {
+                return Err(HostError::new("EXTENSION_REVOKED"));
+            }
+            for field in ["release_id", "download_path"] {
+                if map
+                    .remove(field)
+                    .and_then(|v| v.as_str().map(str::to_owned))
+                    .is_none()
+                {
+                    return Err(unavailable());
+                }
+            }
+            let remote: Release = serde_json::from_value(item).map_err(|_| unavailable())?;
+            found.push(hash(&serde_json::to_vec(&remote).unwrap()));
+        }
+        let release_hash = hash(&serde_json::to_vec(release).unwrap());
+        if found != [release_hash.clone()] {
+            return Err(HostError::new("EXTENSION_TRUST_CHANGED"));
+        }
+        let checked = Checked {
+            source: self.source.to_string(),
+            release_hash,
+            key_hash: hash(pin.public_key),
+            checked_at: started,
+        };
+        checked.matches(self.source.as_str(), release, pin.public_key)?;
+        Ok(checked)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::{
+        io::{Read, Write},
+        net::TcpListener,
+    };
+    #[tokio::test]
+    async fn live_responses_require_pinned_key_exact_release_and_no_revocation() {
+        let mut fixture: Value = serde_json::from_str(include_str!(
+            "../../src/services/fixtures/community-python-vector.json"
+        ))
+        .unwrap();
+        let public: [u8; 32] = STANDARD
+            .decode(fixture["key"]["public_key"].as_str().unwrap())
+            .unwrap()
+            .try_into()
+            .unwrap();
+        let display = fixture["release"].clone();
+        for field in ["release_id", "withdrawn", "download_path"] {
+            fixture["release"].as_object_mut().unwrap().remove(field);
+        }
+        let release: Release = serde_json::from_value(fixture["release"].clone()).unwrap();
+        for case in [
+            "ok",
+            "revoked",
+            "rotated",
+            "withdrawn",
+            "changed",
+            "duplicate",
+            "offline",
+            "redirect",
+        ] {
+            let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+            let url = format!("http://{}/", listener.local_addr().unwrap());
+            let mut source = json_source(&public);
+            let mut remote = display.clone();
+            if case == "revoked" {
+                source["keys"][0]["revoked"] = true.into();
+            }
+            if case == "rotated" {
+                source["keys"][0]["public_key"] = STANDARD.encode([9; 32]).into();
+            }
+            if case == "withdrawn" {
+                remote["withdrawn"] = true.into();
+            }
+            if case == "changed" {
+                remote["description"] = "changed".into();
+            }
+            let list = if case == "duplicate" {
+                serde_json::json!({"items":[remote.clone(),remote]})
+            } else {
+                serde_json::json!({"items":[remote]})
+            };
+            let responses = if matches!(case, "revoked" | "rotated" | "offline" | "redirect") {
+                vec![source]
+            } else {
+                vec![source, list]
+            };
+            let worker = std::thread::spawn(move || {
+                for body in responses {
+                    let (mut stream, _) = listener.accept().unwrap();
+                    let mut bytes = [0; 8192];
+                    stream.read(&mut bytes).unwrap();
+                    let body = body.to_string();
+                    let status = match case {
+                        "offline" => "503 Unavailable",
+                        "redirect" => "302 Found",
+                        _ => "200 OK",
+                    };
+                    write!(stream,"HTTP/1.1 {status}\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{body}",body.len()).unwrap();
+                }
+            });
+            let mut client = Client::new("https://catalog.example/").unwrap();
+            client.source = reqwest::Url::parse(&url).unwrap();
+            let result = client
+                .check(
+                    Pin {
+                        source_id: "fixture",
+                        key_id: "test-key",
+                        namespace: "examples",
+                        public_key: &public,
+                    },
+                    &release,
+                )
+                .await;
+            assert_eq!(result.is_ok(), case == "ok", "{case}");
+            if let Ok(mut checked) = result {
+                checked.matches(&url, &release, &public).unwrap();
+                checked.checked_at = Instant::now() - Duration::from_secs(31);
+                assert!(checked.matches(&url, &release, &public).is_err());
+            }
+            worker.join().unwrap();
+        }
+        assert!(Client::new("http://catalog.example").is_err());
+    }
+    fn json_source(public: &[u8; 32]) -> Value {
+        serde_json::json!({"schema_version":1,"source_id":"fixture","keys":[{"key_id":"test-key","namespace":"examples","public_key":STANDARD.encode(public),"revoked":false}]})
+    }
+}
diff --git a/frontend/src-tauri/src/lib.rs b/frontend/src-tauri/src/lib.rs
index 85f8e9d..80c5733 100644
--- a/frontend/src-tauri/src/lib.rs
+++ b/frontend/src-tauri/src/lib.rs
@@ -48,3 +48,6 @@ pub mod extension_transaction;
 
 #[cfg(feature = "desktop")]
 pub mod extension_config;
+
+#[cfg(feature = "desktop")]
+pub mod extension_trust;