feat(v0.5): expand Tibetan + Theravāda each from 1 → 3 masters (15 total)

Second cross-tradition expansion. v0.4 introduced Milarepa + Ajahn
Chah; this release adds the major foundational figures of each
non-Chinese tradition that were missing.

藏传 (Tibetan): now 3 — Atiśa, Tsongkhapa, Milarepa
南传 (Theravāda): now 3 — Buddhaghosa, Mahasi Sayadaw, Ajahn Chah
汉传 (Chinese): unchanged at 8

New masters
-----------
* prebuilt/atisha/ — Atiśa Dīpaṃkara (982-1054). 噶当派 founder,
  Indo-Tibetan bridge. Sources: Toh 4465 Bodhipathapradīpa + Toh
  3948 self-commentary + 噶当口耳传承 Pha chos / Bu chos. Coverage:
  three scopes, bodhicitta (七因果 + 自他相换 from Suvarṇadvīpa
  Dharmakīrti), 戒律严持, 噶当六论, 依止善知识. HARD-GATE:
  NO_ESOTERIC_INSTRUCTION + NO_ANACHRONISTIC_ATTRIBUTION (don't
  project later Gelug analytical Madhyamaka onto Atiśa's era).

* prebuilt/tsongkhapa/ — Tsongkhapa Lobsang Drakpa (1357-1419).
  Gelug founder, basis of Dalai Lama / Panchen Lama lineages.
  Sources: 宗喀巴全集 gsung 'bum (BDRC searchable) — Lam rim chen
  mo, sNgags rim chen mo, Drang nges legs bshad snying po, 入中论
  善显密意疏, 三主要道. Coverage: 三主要道 (出离心 / 菩提心 / 清净
  见), lamrim, 应成中观, 三聚戒, 闻思修, 五部大论. HARD-GATE:
  NO_ESOTERIC_INSTRUCTION + NO_CROSS_SCHOOL_CONTAMINATION (don't
  blend Dzogchen / Mahāmudrā into Gelug positions) +
  NO_UNVERIFIED_BDRC_W_NUMBERS (descriptive guidance instead of
  fabricated W-IDs; lessons-learned from v0.4 fixup).

* prebuilt/buddhaghosa/ — Buddhaghosa (5th century). 上座部
  commentarial summit. Sources: PTS Vism + four Nikāya aṭṭhakathā
  + Samantapāsādikā (Vinaya) + Atthasālinī (Abhidhamma). Coverage:
  戒定慧三学, 四十种业处, 七清净十六观智, 缘起十二支 (three-life-
  two-causations interpretation), 阿毗达摩 paramattha vs paññatti,
  六义诠释 commentarial method. HARD-GATE:
  NO_MAHAYANA_CONTAMINATION + NO_MAHAVIHARA_PRIMACY_OVERSTATEMENT.

* prebuilt/mahasi-sayadaw/ — Mahāsi Sayādaw U Sobhana (1904-1982).
  Burmese Vipassanā tradition / Mahasi Method. Sources: Manual of
  Insight (Wisdom Publications 2016) + Progress of Insight (BPS
  Sri Lanka Wheel No. 280) + Practical Vipassanā Meditation
  Exercises (Mahasi Sasana Yeiktha) + SC + PTS Vism. Coverage:
  标记法 Noting Method, 腹部起伏 rising-falling primary object,
  七清净十六观智 progress, khaṇika-samādhi & vipassanā-jhāna,
  '初果可证' ethos, MN 10 Satipaṭṭhāna foundation. HARD-GATE:
  NO_FABRICATED_QUOTES + **NO_ATTAINMENT_JUDGMENT** (the strictest
  guardrail in this release — Mahasi's stages-of-insight framework
  is famous for inducing self-attainment delusions; AI is forbidden
  from confirming any individual's observed jhāna stage / fruition).

Each master ships the standard v0.3 progressive-disclosure shape:
SKILL.md (decision tree + HARD-GATE + Quick Reference) + meta.json +
references/{voice,teaching}.md + sources/INDEX.md + ≥1 excerpts file
+ tests/fidelity.jsonl with 12-13 cases each.

ETHICS updates
--------------
* Tier A grows from 9 → 12: Atiśa (>970yr), Tsongkhapa (>600yr),
  Buddhaghosa (>1500yr) all join based on age + open-canon sourcing.
* Tier B 特例 grows from 1 → 2: Mahasi Sayadaw codified under same
  Forest-Sangha-style rationale as Ajahn Chah, with explicit
  NO_ATTAINMENT_JUDGMENT addendum specific to his lineage's risks.
* Sectarian-judgment policy explicit extension: covers Theravāda
  intra-tradition meditation lineages (Mahasi vs Pa-Auk vs Goenka
  vs Thai Forest) — no superiority claims permitted.

compare-masters meta-skill
--------------------------
prebuilt/compare/SKILL.md updated:
* 可用祖师 table now lists all 15 masters by tradition.
* Topic mapping fallback table extended with rows pairing the new
  masters: 中观 (kumarajiva + tsongkhapa), 道次第 (atisha +
  tsongkhapa), 心识 (xuanzang + buddhaghosa + huineng), 戒律
  (xuyun + atisha + buddhaghosa), 禅修方法 (buddhaghosa + mahasi
  + ajahn-chah), 七清净 (buddhaghosa + mahasi), 论师风格 (xuanzang
  + tsongkhapa + buddhaghosa), 三大传统对比 (huineng + tsongkhapa
  + buddhaghosa).
* New cross-tradition guardrails: don't blend traditions (don't
  project Gelug positions onto Atiśa's era; don't put Mahāmudrā
  into Gelug; don't put Tathāgatagarbha into Theravāda).

Surface bumps
-------------
* All 4 plugin manifests + package.json + gemini-extension.json
  bumped 0.4.0 → 0.5.0 with description updated to "15 prebuilt
  masters".
* SKILL.md (project-level) preset list expanded to 8/3/3.
* README.md + README_EN.md: situational guidance table extended
  with cross-tradition rows for the 4 new entries; new master cards
  added with provenance notes; v0.5 release banner appended above
  v0.4 banner.

Validation
----------
* python scripts/validate.py --strict   → ✅ 15 masters pass
* python scripts/validate-fidelity.py   → ✅ all valid
* python scripts/test-fidelity.py --all --dry-run  → ✅
* pytest tests/                          → ✅ 31 passed, 6 skipped

Notes
-----
* fojin_text_ids=[] for new masters — FoJin DB still hasn't imported
  BDRC Tibetan canon nor PTS Vism / SuttaCentral Pali full text;
  RAG falls back to the global corpus and each prompt explicitly
  notes this.
* The two Tibetan masters intentionally use descriptive BDRC
  guidance ("BDRC: 见宗喀巴 gsung 'bum") rather than fabricated
  W-numbers, applying lessons learned from the v0.4 fixup where
  W29193 was mistakenly assigned to two different works in early
  drafts. Toh (Tohoku) numbers are kept where they're well-attested
  in 藏学界 (Toh 4465 for Bodhipathapradīpa).
* CompanionPRs in xr843/fojin (#507 + #508) already synchronized
  the chat-mode subset of these 6 cross-tradition masters; v0.5 of
  this repo brings the Master-skill side to parity.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README_EN.md

@@ -24,7 +24,7 @@
 
 <p align="center">
   <strong>AI learning companions modeled after historical Buddhist masters across three traditions</strong><br>
-  10 pre-built masters · 汉传 / 藏传 / 南传 cross-tradition · CBETA / BDRC / SuttaCentral citations · AgentSkills Standard
+  15 pre-built masters · 汉传 / 藏传 / 南传 cross-tradition · CBETA / BDRC / SuttaCentral / PTS Vism citations · AgentSkills Standard
 </p>
 
 <p align="center">
@@ -45,7 +45,7 @@
 
 ### 👉 [Open fojin.app/chat](https://fojin.app/chat)
 
-On the AI Q&A page, open the **"法师模式"** (Master Mode) dropdown in the bottom-left and pick one of the 10 pre-built masters across three traditions to start chatting.
+On the AI Q&A page, open the **"法师模式"** (Master Mode) dropdown in the bottom-left and pick one of the 15 pre-built masters across three traditions to start chatting.
 
 - No install, no signup
 - `/compare-masters` multi-master comparison works across traditions too
@@ -59,18 +59,27 @@ On the AI Q&A page, open the **"法师模式"** (Master Mode) dropdown in the bo
 | "My mind is scattered, I can't sit still" | `/xuyun` `/zhiyi` `/ajahn-chah` (huatou / śamatha-vipaśyanā / mindfulness) |
 | "I can't follow the logic of the sutras" | `/xuanzang` (Yogācāra precision) |
 | "I've studied for years but feel stuck" | `/yinguang` (plain, sincere nianfo) |
-| "I want to understand emptiness" | `/kumarajiva` `/huineng` `/milarepa` (Madhyamaka / direct pointing / Mahāmudrā clarity-emptiness) |
+| "I want to understand emptiness" | `/kumarajiva` `/huineng` `/milarepa` `/tsongkhapa` (Madhyamaka translator / direct pointing / Mahāmudrā / prasaṅgika analysis) |
 | "I want a systematic view of Huayan / Tiantai" | `/fazang` `/zhiyi` (classification and metaphysics) |
 | "I'm torn between Chan and Pure Land" | `/ouyi` (cross-tradition synthesis) |
 | "I'm curious about ascetic practice / retreat" | `/milarepa` (snow-mountain retreat · Kagyu paradigm) |
 | "I want the simplest meditation instructions" | `/ajahn-chah` (Thai Forest · ānāpānasati) |
+| "I want a complete graduated path of practice" | `/atisha` `/tsongkhapa` (Kadam three scopes → Gelug Lamrim) |
+| "I want the systematic Theravāda commentarial framework" | `/buddhaghosa` (*Visuddhimagga* — sīla / samādhi / paññā + 7 purifications · 16 insight knowledges) |
+| "I want intensive vipassanā with the noting method" | `/mahasi-sayadaw` (Burmese · noting · rising-falling) |
 | "I want a cross-tradition perspective" | `/compare-masters` (auto-pairs 汉/藏/南 voices) |
 
 > Developers and Claude Code / Cursor users should skip to [Developer Installation](#developer-installation) to use the masters as terminal AgentSkills.
 
 ---
 
-> **v0.4 Update (2026-05)**: Cross-tradition expansion — added Tibetan **Milarepa** (Kagyu / Mahāmudrā / Naro Chodruk) and Theravāda **Ajahn Chah** (Thai Forest Tradition / Wat Pah Pong). Citation system extended to support BDRC (Tibetan canon) and SuttaCentral (Pali canon). HARD-GATE adds `no_esoteric_instruction` (esoteric practice steps never disclosed) and `no_fabricated_quotes` (Theravāda discourses must trace to authorized published collections).
+> **v0.5 Update (2026-05-02)**: Second cross-tradition expansion — Tibetan and Theravāda each grow from 1 master to 3. Total **15 masters**.
+> - 藏传 added: Atiśa (Kadam founder · Toh 4465 *Bodhipathapradīpa* · three scopes) + Tsongkhapa (Gelug founder · three principal aspects · Madhyamaka prasaṅgika)
+> - 南传 added: Buddhaghosa (commentarial summit · *Visuddhimagga*) + Mahasi Sayadaw (Burmese vipassanā · noting method · ETHICS Tier B special case)
+> - HARD-GATE strengthened: Mahasi Sayadaw specifically gets `NO_ATTAINMENT_JUDGMENT` (AI must not confirm any individual's stage of insight)
+> - ETHICS Tier A grows to 11 masters; Tier B special-case grows to include Mahasi Sayadaw (parallel to Ajahn Chah)
+>
+> **v0.4 Update (2026-05-02)**: First cross-tradition expansion — added Tibetan **Milarepa** (Kagyu / Mahāmudrā) and Theravāda **Ajahn Chah** (Thai Forest Tradition). Citation system extended to support BDRC and SuttaCentral. HARD-GATE adds `no_esoteric_instruction` and `no_fabricated_quotes`.
 >
 > **v0.3**: Full architecture rebuild — provenance frontmatter, offline source passages (`sources/`), automated fidelity tests (`fidelity.jsonl`), NPX installer, two-stage independent review, HARD-GATE rules, multi-platform plugin support across Claude Code / Cursor / Codex / OpenCode / Gemini CLI, session-start hook auto-injecting the master list.
 
@@ -88,7 +97,7 @@ This project is built out of respect for Buddhist traditions. All content is gen
 
 ## Features
 
-- **10 pre-built masters across three traditions**: 8 汉传 (Yogācāra, Madhyamaka, Chan, Tiantai, Huayan, Pure Land, cross-tradition) + 1 藏传 (Kagyu / Milarepa) + 1 南传 (Thai Forest / Ajahn Chah) — ready to use out of the box
+- **15 pre-built masters across three traditions**: 8 汉传 (Yogācāra, Madhyamaka, Chan, Tiantai, Huayan, Pure Land, cross-tradition) + 3 藏传 (Kadam · Atiśa; Gelug · Tsongkhapa; Kagyu · Milarepa) + 3 南传 (Theravāda commentator · Buddhaghosa; Burmese vipassanā · Mahasi Sayadaw; Thai Forest · Ajahn Chah) — ready to use out of the box
 - **Provenance enforcement**: Every master ships with authoritative source IDs (CBETA / BDRC / SuttaCentral) and FoJin text IDs in frontmatter; every doctrinal claim must carry a scriptural citation
 - **Offline source passages**: `sources/` captures key passages from each master's core canon, so citations still work when FoJin is unreachable
 - **Progressive disclosure**: SKILL.md is a decision tree + quick reference; `references/` and `sources/` are loaded on demand to keep context lean
@@ -113,7 +122,7 @@ This project is built out of respect for Buddhist traditions. All content is gen
 **NPX (recommended)**
 
 ```bash
-npx master-skill install --all    # Install all 10 masters
+npx master-skill install --all    # Install all 15 masters
 npx master-skill list             # List available masters
 ```
 
@@ -154,10 +163,14 @@ In any AgentSkills-compatible environment (Claude Code / Cursor / Codex CLI / Op
 /xuyun          — Master Xuyun (Chan, Five Houses)
 
 # 藏传 (Tibetan)
-/milarepa       — Milarepa (Kagyu · Mahāmudrā · Naro Chodruk)
+/atisha         — Atiśa Dīpaṃkara (Kadam founder · three scopes · 982-1054)
+/tsongkhapa     — Tsongkhapa (Gelug founder · three principal aspects · prasaṅgika · 1357-1419)
+/milarepa       — Milarepa (Kagyu · Mahāmudrā · Naro Chodruk · 1052-1135)
 
 # 南传 (Theravāda)
-/ajahn-chah     — Ajahn Chah (Thai Forest Tradition · Wat Pah Pong)
+/buddhaghosa    — Buddhaghosa (commentarial summit · Visuddhimagga · 5th century)
+/mahasi-sayadaw — Mahasi Sayadaw (Burmese vipassanā · noting method · 1904-1982)
+/ajahn-chah     — Ajahn Chah (Thai Forest Tradition · Wat Pah Pong · 1918-1992)
 ```
 
 ### Compare Masters
@@ -244,6 +257,20 @@ Modern Chan patriarch who lived to 119 years. Unprecedented in Buddhist history
 Primary sources: CBETA — Shurangama Sutra, Diamond Sutra, Platform Sutra.
 Invoke: `/xuyun`
 
+### Atiśa Dīpaṃkara (982-1054) — Tibetan · Kadam · Indo-Tibetan bridge
+
+Royal-born Indian master from the Sahor kingdom (modern Bangladesh). Studied Madhyamaka, Yogācāra and tantra at Vikramaśīla; received the bodhicitta lineage from Dharmakīrti of Suvarṇadvīpa (Sumatra). Invited to Tibet in 1042 by King Yeshe Ö to reform a tradition where Vinaya had decayed and tantra had become disconnected from sūtra foundations. His *Bodhipathapradīpa* (Toh 4465) became the source text for all later Tibetan *lamrim* literature. His chief disciple Dromtönpa founded Reting Monastery, originating the **Kadam school** — later succeeded by Tsongkhapa's "New Kadam" (Gelug). All four Tibetan schools recognize him as a root teacher.
+Primary sources: Toh 4465 *Bodhipathapradīpa* + Toh 3948 self-commentary + Kadam oral lineage *Pha chos / Bu chos*.
+Invoke: `/atisha`
+
+### Tsongkhapa (1357-1419) — Tibetan · Gelug founder
+
+Founder of the **Gelug school** (dGe lugs pa, "the way of virtue"; popularly known as the "Yellow Hat school") — basis of the Dalai Lama and Panchen Lama lineages. Born in Tsongkha (Qinghai). Studied with masters across all major schools, particularly the Sakya scholar Rendawa for prasaṅgika Madhyamaka. Reformed lax monastic discipline, integrated sūtra and tantra into a strict graduated path, and produced the great triology: *Lamrim Chenmo* (Great Treatise on the Stages of the Path), *sNgags rim chen mo* (Great Treatise on Tantra), and *Drang nges legs bshad snying po* (Essence of True Eloquence — definitive vs interpretable meaning). Founded Ganden Monastery (1409) — the seat of the school.
+Primary sources: Tsongkhapa's collected works (*gsung 'bum*, searchable on BDRC.io). Chinese translation by Dharma-master Faxun is the standard Sinophone reference.
+Invoke: `/tsongkhapa`
+
+> ⚠️ Tantric practice steps, empowerment liturgy, generation- and completion-stage details, deity mantras, and channels-and-drops practice are introduced **only at the level of name and historical context — concrete practice instructions are never given**.
+
 ### Milarepa (1052-1135) — Tibetan · Kagyu
 
 Spiritual ancestor of the Tibetan Kagyu lineage and the paradigm of the "yogi tradition" (no monastery, mountain retreat, teaching through song). After committing serious harm in his youth through black magic, he sought purification under Marpa the Translator, who put him through severe trials before transmitting the complete Mahāmudrā and Naro Chodruk lineages. He spent decades in Himalayan retreat, surviving on nettles, and taught through extemporaneous **mGur** (songs of realization) — shaping the entire later Tibetan tradition.
@@ -252,6 +279,20 @@ Invoke: `/milarepa`
 
 > ⚠️ Naro Chodruk (Six Yogas), tummo, generation/completion stages and other esoteric practices are introduced **only at the level of name and historical context — concrete practice instructions are never given**. Authentic transmission requires direct empowerment from a qualified teacher.
 
+### Buddhaghosa (5th century) — Theravāda · commentarial summit
+
+The most influential commentator and śāstra master in Theravāda history. Born a brahmin scholar in southern India, he travelled to the Mahāvihāra in Anurādhapura (Sri Lanka) to translate the old Sinhala commentaries (*Sīhaḷa-aṭṭhakathā*) into Pali. To prove his competence, he first composed the *Visuddhimagga* — a 23-chapter encyclopedia of Theravāda meditation and doctrine organized around the threefold training of **sīla, samādhi, paññā**. He then translated the four Nikāya commentaries, the Vinaya commentary *Samantapāsādikā*, and the Abhidhamma commentaries. His framework defines orthodox Theravāda exegesis to this day across Sri Lanka, Burma, Thailand, Cambodia, and Laos.
+Primary sources: PTS edition *Visuddhimagga* + four Nikāya *aṭṭhakathā* (Sumaṅgalavilāsinī, Papañcasūdanī, Sāratthappakāsinī, Manorathapūraṇī) + *Samantapāsādikā* (Vinaya) + *Atthasālinī* (Abhidhamma).
+Invoke: `/buddhaghosa`
+
+### Mahāsi Sayādaw U Sobhana (1904-1982) — Theravāda · Burmese vipassanā
+
+One of the most internationally influential meditation masters of modern Burma. Recognized as a *Pariyatti Sāsanahita* — the highest scriptural qualification in Burmese monasticism — by age 27. Studied four-foundations vipassanā with U Nārada (Mingun Sayadaw) from 1932. Established the **Mahasi Sasana Yeiktha** retreat center in Yangon in 1947, formalizing the **noting method** (rising-falling at the abdomen as primary object) tied to Visuddhimagga's seven purifications and sixteen insight knowledges. Served as *Final Editor* of the Sixth Buddhist Council (1954-1956) — the largest modern revision of the Pali Canon. His lineage profoundly shaped the founders of America's Insight Meditation Society (Goldstein, Salzberg, Kornfield).
+Primary sources: *Manual of Insight* (Wisdom Publications, 2016 English ed.), *The Progress of Insight* (BPS Sri Lanka Wheel No. 280), *Practical Vipassanā Meditation Exercises* (Mahasi Sasana Yeiktha).
+Invoke: `/mahasi-sayadaw`
+
+> ⚠️ **The AI must never confirm any individual's stage of insight or attainment of fruition.** Verification requires face-to-face interview with a qualified teacher. This is the strictest guardrail in this skill — the Mahasi tradition's "fruition is attainable" framing is famous for inducing self-attainment delusions, and the AI is forbidden from playing that role.
+
 ### Ajahn Chah Subhaddo (1918-1992) — Theravāda · Thai Forest
 
 One of the most internationally influential masters of the Thai Forest Tradition. Renowned for strict Vinaya observance, four-foundations-of-mindfulness practice, and plain, life-grounded teaching style. His Western disciples (Ajahn Sumedho, Ajahn Pasanno, Ajahn Amaro and others) established Abhayagiri (California), Amaravati (UK), Cittaviveka (UK) and other branch monasteries, carrying the forest tradition to the West. Most-quoted line: *"If you let go a little, you have a little peace; if you let go completely, you have complete peace."*