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2	2
3	3	**FactHarbor system architecture including POC simplifications and full system design**
4	4
5		----
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6	6
7	7	== 1. Architecture Evolution ==
8	8
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49	49	{{/diagram}}
50	50
51	51	**Components:**
	52	+
52	52	* Single AKEL API call (Claude Sonnet 4.5)
53	53	* Gates 1 & 4 (claim validation, verdict confidence)
54	54	* Basic UI display
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56	56
57	57	**Data Storage:** Minimal (stateless or simple SQLite)
58	58
59		----
	60	+----
60	60
61	61	=== 1.2 POC2 Architecture (Enhanced) ===
62	62
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102	102	{{/diagram}}
103	103
104	104	**New Components:**
	106	+
105	105	* Scenario generation
106	106	* Evidence deduplication system
107	107	* Gates 2 & 3 (evidence relevance, scenario coherence)
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109	109
110	110	**Data Storage:** Enhanced (claims, scenarios, evidence, metrics)
111	111
112		----
	114	+----
113	113
114	114	=== 1.3 Full System Architecture (V1.0+) ===
115	115
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161	161	{{/diagram}}
162	162
163	163	**Production Components:**
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164	164	* Multi-component AKEL pipeline
165	165	* Review workflow system
166	166	* Audit sampling framework
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167	167	* Federation architecture
168	168	* Full data model (PostgreSQL + Redis + S3)
169	169
170		----
	173	+----
171	171
172	172	== 2. Quality Gate Architecture ==
173	173
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213	213	(Any gate FAIL → Block + Explain)
214	214	{{/diagram}}
215	215
216		----
	219	+----
217	217
218	218	=== 2.2 Gate Implementation by Phase ===
219	219
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225	225
226	226	**Hardening** means: Thresholds validated, edge cases handled, <5% failure rate
227	227
228		----
	231	+----
229	229
230	230	== 3. Data Architecture ==
231	231
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234	234	**Storage:** SQLite or minimal database
235	235
236	236	**Entities:**
	240	+
237	237	* Articles (input text/URL)
238	238	* Claims (extracted from articles)
239	239	* Verdicts (per claim)
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241	241
242	242	**No complex relationships, versioning, or scenarios**
243	243
244		----
	248	+----
245	245
246	246	=== 3.2 Full System Data Model (V1.0+) ===
247	247
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248	248	**Storage:** PostgreSQL (primary), Redis (cache), S3 (documents)
249	249
250	250	**Core Entities:**
	255	+
251	251	* Claims (with versions, clustering)
252	252	* Scenarios (interpretations of claims)
253	253	* Evidence (deduplicated, provenance tracked)
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257	257
258	258	**Complex relationships, full audit trail, federation support**
259	259
260		----
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261	261
262	262	== 4. Component Architecture ==
263	263
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267	267	**Full System:** Multi-component orchestration
268	268
269	269	**Responsibilities:**
	275	+
270	270	* Route input through component pipeline
271	271	* Manage component state
272	272	* Handle errors and retries
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273	273	* Coordinate quality gates
274	274	* Trigger review workflows
275	275
276		----
	282	+----
277	277
278	278	=== 4.2 Quality Gate Validator ===
279	279
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280	280	**All Phases:** Present but evolving complexity
281	281
282	282	**Responsibilities:**
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283	283	* Execute all configured gates
284	284	* Aggregate gate results
285	285	* Make publication decisions
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286	286	* Generate explanatory messages
287	287	* Log quality metrics
288	288
289		----
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290	290
291	291	=== 4.3 Review Queue Manager ===
292	292
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295	295	**V1.0:** Full implementation
296	296
297	297	**Responsibilities:**
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298	298	* Route low-confidence verdicts to review
299	299	* Manage reviewer assignments
300	300	* Track review status
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301	301	* Implement audit sampling
302	302	* Generate review metrics
303	303
304		----
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305	305
306	306	== 5. Architecture Decisions ==
307	307
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308	308	=== 5.1 Why Single AKEL Call for POC? ===
309	309
310	310	**Rationale:**
	319	+
311	311	* Validates core capability fastest
312	312	* Simplest to implement and test
313	313	* Fail-fast if AI fundamentally can't do task
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316	316
317	317	**Trade-off:** Less granular control, harder to optimize individual steps
318	318
319		----
	328	+----
320	320
321	321	=== 5.2 Why Add Components in V1.0? ===
322	322
323	323	**Rationale:**
	333	+
324	324	* Better error handling per step
325	325	* Independent optimization of each component
326	326	* Easier to add new capabilities
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329	329
330	330	**Trade-off:** More complexity, more to maintain
331	331
332		----
	342	+----
333	333
334	334	== 6. Related Pages ==
335	335
336	336	* [[Requirements>>Test.FactHarbor.Specification.Requirements.WebHome]] - System requirements
337		-* [[Design>>Test.FactHarbor.Specification.Design.WebHome]] - UI/UX design
338		-* [[Roadmap>>Test.FactHarbor.Roadmap.WebHome]] - Implementation phases
339		-* [[POC1>>Test.FactHarbor.Roadmap.POC1.WebHome]] - POC1 details
340		-* [[POC2>>Test.FactHarbor.Roadmap.POC2.WebHome]] - POC2 details
	347	+* [[Design>>FactHarbor.Archive.FactHarbor delta for V0\.9\.70.Specification.Design.WebHome]] - UI/UX design
	348	+* [[Roadmap>>FactHarbor.Archive.FactHarbor delta for V0\.9\.70.Roadmap.WebHome]] - Implementation phases
	349	+* [[POC1>>FactHarbor.Archive.FactHarbor delta for V0\.9\.70.Roadmap.POC1.WebHome]] - POC1 details
	350	+* [[POC2>>FactHarbor.Archive.FactHarbor delta for V0\.9\.70.Roadmap.POC2.WebHome]] - POC2 details
341	341
342		----
	352	+----
343	343
344	344	**Document Status:** ✅ Architecture Specified (POC1, POC2, Full System)
345	345	**Version:** V0.9.70
346		-