diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f15046..1ca184b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,20 @@ All notable changes to bestASR are documented here. The format follows
 
 ## [Unreleased]
 
+### Added
+
+- **Confidence-gated hallucination filtering (#100)**: `--hallucination-filter
+  full` drops cues by Whisper's per-segment signals — the joint silence rule
+  (`no_speech_prob > 0.6` AND `avg_logprob < -1.0`) and the repetition rule
+  (`compression_ratio > 2.4`) — on top of the denylist. Backends that don't
+  compute the signals (whisper.cpp, Parakeet) degrade to `denylist`
+  automatically; output formats unchanged.
+- **WhisperKit decode-param knobs (#101)**: `--no-speech-threshold`,
+  `--compression-ratio-threshold`, `--logprob-threshold` (WhisperKit only;
+  unset rides WhisperKit's own defaults) suppress hallucinations at decode
+  time, complementing the post-decode filter. Negative values parse in space
+  form (`--logprob-threshold -1.0`).
+
 ## [0.13.0] - 2026-07-16
 
 ### Added
diff --git a/changelog/20260716_hallucination-phase23.md b/changelog/20260716_hallucination-phase23.md
new file mode 100644
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@@ -0,0 +1,30 @@
+# 2026-07-16 — 幻覺過濾 Phase 2+3（#100 confidence-gated full 模式、#101 decode knobs）
+
+## 出貨（PR #102，cluster：兩案共享 WhisperKitEngine/TranscribeOptions/CLI）
+
+- **`--hallucination-filter full`（#100）**：denylist 之上加 confidence gating——
+  openai-whisper 語意的聯合靜音規則（`noSpeechProb > 0.6` **且** `avgLogprob < -1.0`）
+  與重複規則（`compressionRatio > 2.4`）。`RawSegment`/`TranscriptSegment` 新增
+  optional `noSpeechProb`/`compressionRatio`（WhisperKit 填入；其他 backend 留 nil，
+  nil 永不觸發門檻 → `full` 對該 backend 自動退化為 `denylist`，零分支）。
+  輸出格式不變（訊號僅供 filter 內部使用）。MCP `hallucination_filter` 參數自動可用 `full`。
+- **WhisperKit decode-param knobs（#101）**：`--no-speech-threshold` /
+  `--compression-ratio-threshold` / `--logprob-threshold`（WhisperKit 限定；
+  未設 = 原廠預設 byte-for-byte）。verify 抓到真 HIGH：ArgumentParser 拒收前導
+  dash 值，而 log-prob 定義域恆為負——文件化的空格寫法在整個有意義範圍不可用；
+  以 `parsing: .unconditional` 修復 + 以真實 `Transcribe` 命令的空格形式回歸測試
+  （test target 因此連結 executable target）。`chunkingStrategy` 依 issue 原文
+  「possibly」明文緩議（residue）。
+
+## 程式檔變更（今日）
+
+- `Sources/BestASRKit/Output/HallucinationFilter.swift` — `.full` 模式 + 具名門檻常數
+- `Sources/BestASRKit/{Engines/Engine,Engines/WhisperKitEngine,Models/DataModels}.swift` — 訊號 plumbing + knobs
+- `Sources/BestASRKit/CommandCore.swift`、`Sources/bestasr/BestASRCommand.swift` — 三 knob 貫穿 CLI
+- `Tests/BestASRKitTests/{HallucinationFullModeTests,DecodeKnobsTests}.swift` — 10 個新測試
+- `Package.swift` — test target 連結 executable（CLI parse 回歸測試）
+- `README.md` — full 模式 + knobs + deterministic 交互 + CLI-only scope
+
+## 維運
+
+- #100 / #101 已以完整 closing summaries 手動關閉（cluster close）；backlog 歸零。