# I want to run a pre-mortem on us buying a 'https:/...

## Conversation

## User
*2026-07-02T13:36:30.664484+00:00*

I want to run a pre-mortem on us buying a 'https://www.hobie.com/kayaks/mirage-tandem-island/' (Mirage Tandem Island). We live in Cataument MA on red brook harbor. We also have an RS Quest and some regular kayaks. It would be used by my wife Robin and me - John. Help me set up a study that imagines the plan has failed, identifies the most plausible failure paths, and surfaces early warning signs we should watch for.

---

## Assistant
*2026-07-02T13:36:47.761561+00:00*

**Thinking:**

> The user wants to run a pre-mortem analysis on purchasing a Hobie Mirage Tandem Island kayak. Let me first read the relevant skills to understand the workflow, then gather information about the product before designing the study.
>
> Let me start by reading the workflow-session-start skill and the research-premortem skill to understand how to proceed.

Great topic for a pre-mortem! Before I dive into planning, let me pull up the relevant skills and learn about the boat you're considering.

**Tool calls:**

- `Skill`

  ```
  Launching skill: workflow-session-start
  ```

- `Skill`

  ```
  Launching skill: research-premortem
  ```

**Thinking:**

> Let me also read the premortem CLI quick reference and check for any existing sessions/topics related to this user's request.

Now let me gather the product details and check for any prior context, in parallel:

**Tool calls:**

- `mcp__firecrawl__firecrawl_scrape` - `url`: https://www.hobie.com/kayaks/mirage-tandem-island/

  ```
  {
    "markdown": "Skip to main contentEnable accessibility for low visionOpen the accessibility menu\n\n![Spinner: White decorative](https://cdn.userway.org/widgetapp/images/spin_wh.svg)\n\n![](https://cdn.userway.org/widgetapp/images/body_wh.svg)\n\n![Spinner: White decorative](https://cdn.userway.org/widgetapp/images/spin_wh.svg)\n\n![Mirage Tandem Island mobile header image](https://static.hobie.com/consumer/videos/product-video-headers/posters/mirage-tandem-island.jpg?v=kiFYYk12m)[Find a Dealer](https://www.hobie.com/dealers/locations/)\n\n# Mirage Tandem Island\n\nSailing has never seemed so simple. When the wind blows, the Tandem Island flies across the water, powered by an expansive, easily tended mainsail.\n\n![Mirage Tandem Island Pedal Kayaks](https://media.hobie.com/digital_asset_profiles/TandemIsland_studio_3qrd_hibiscus_2018_png_1200x9999__generated.png)\n\n* * *\n\nHop aboard with a friend. With dual MirageDrive 180s providing forward and reverse pedal power, maneuvering is a snap even when the zephyrs subside. Our patented Kick-Up Fins automatically “kick-up” on contact with an underwater obstacle and automatically adjust back into place once clear. The central hull is pure high-end Hobie with all the expected features: multiple Twist and Seal hatches, a large bow hatch for below-decks storage, lever-operated rudder and centerboard deployment and dual rudder control. This is Hobie’s ultimate fish hunter, capable of marlin teasing trolling speeds.\n\n$8,799 USD MSRP\n\n![Color: Red Hibiscus](https://static.hobie.com/consumer/images/colorchip-red-hibiscus.png?v=kiFYYk12m)![Color: Ivory Dune](https://static.hobie.com/consumer/images/colorchip-ivory-dune.png?v=kiFYYk12m)\n\n* * *\n\nSpecs [Top View Features](https://www.hobie.com/kayaks/mirage-tandem-island/#topview-features)\n\nShop Locally in Mount Hope, KansasChange\n\n[![Powered By MirageDrive 180](https://static.hobie.com/consumer/images/ppb-md180.jpg?v=kiFYYk12m)](https://www.hobie.com/kayaks/mirage-tandem-island/#)![Mirage Tandem Island Features](https://static.hobie.com/consumer/images/psf-ti.jpg?v=kiFYYk12m)[Top View Features](https://www.hobie.com/kayaks/mirage-tandem-island/#topview-features)\n\n[![Mirage Tandem Island Spotlight Video](https://static.hobie.com/consumer/images/psv-ti.jpg)**Mirage  Tandem Island**](https://www.hobie.com/kayaks/mirage-tandem-island/#)\n\n[Image Gallery](https://media.hobie.com/digital_asset_profiles/Tandem_Island_action_Tahoe_family_dune_drinking_2441_full_jpg_1600x1600__generated.jpg)\n\n### THE HOBIE DIFFERENCE:\n\n## KICK-UP FIN TECHNOLOGY\n\nOur Patented Kick-Up Fins provide the power to charge through the water as never before. Logs, kelp, shallows, rocks, no problem.\n\n![MirageDrive Classic](https://static.hobie.com/consumer/images/pkfs-kickup-fin-tech.png)\n\n### THE HOBIE DIFFERENCE:\n\n## MirageDrive 180  A Force of Nature\n\nIn 1997 Hobie revolutionized kayaking forever. Experience 20 years of innovation perfected.\n\nPowered by All New Patented Kick-Up Turbo Fins.\n\n( Shown with upgraded ST Turbo Fins. Comes standard with ST Fins. )\n\n[Learn More](https://www.hobie.com/miragedrive180/)\n\n![MirageDrive 180](https://static.hobie.com/consumer/images/pkfs-miragedrive180.png)\n\n### THE HOBIE DIFFERENCE:\n\n## Vantage CT Seating\n\nUnparalleled adjustability for the utmost comfort, a drier ride, and longer days on the water. The Vantage CT adjusts angle of recline and height quickly and easily.\n\n[Learn More](https://www.hobie.com/vantage-seat/)\n\n![Vantage CT](https://static.hobie.com/consumer/images/pkfs-vantagect.png)\n\n[Previous Slide](https://www.hobie.com/kayaks/mirage-tandem-island/#prod-feat-slider) [Next Slide](https://www.hobie.com/kayaks/mirage-tandem-island/#prod-feat-slider)\n\n### What it takes to be \\#1\n\n![Mirage Tandem Island Pedal Kayaks](https://media.hobie.com/digital_asset_profiles/TandemIsland_studio_red_topview_2020_png_5000x5000_rotate90_generated.png)\n\n![Molded Carrying Handle](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Large Bow Hatch](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![MirageDrive 180 with ST Turbo Fins](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Rudder Up/Down Control](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Mesh Stowage Pocket](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![8\" Twist and Seal Hatch](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Rudder Control](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Kick-up Centerboard](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Vantage CT Seating](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![MirageDrive 180 with ST Turbo Fins](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Rudder Up/Down Control](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![8\" Twist and Seal Hatch](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Cup Holder](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Rudder Control](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Vantage CT Seating](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Rod Holder](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Rear Cargo Area](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![8\" Twist and Seal Hatch with Gear Bucket](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Molded Carrying Handle](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Island Rudder](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Ama](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Aka](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n![Cup Holder](https://static.hobie.com/consumer/images/feature-bullet-img.jpg)\n\n### Lowrance® Ready System\n\nThe Hobie Mirage Tandem Island comes standard with a built-in transducer mount and includes through-hull cable plugs.\n\n( Lowrance transducer not included. Shown on the Mirage Outback. )\n\n[![Mirage Tandem Island Accessory](https://static.hobie.com/consumer/images/pac-lowrance-ready.jpg)](https://www.hobie.com/kayaks/mirage-tandem-island/#)\n\n### Hobie Island Club\n\nJoin the Hobie Island Club with your fellow Adventure and Tandem Island owners. Hobie Island owners are now sailing on oceans, rivers, lakes and waterways in over 40 countries worldwide.\n\n[![Mirage Tandem Island Accessory](https://static.hobie.com/consumer/images/pac-islandclub.jpg)](https://www.hobie.com/kayaks/mirage-tandem-island/#)\n\nExcludes taxes, any shipping and set up fees.\n\n**Be first in line to hear about the latest Hobie news, updates and products.**\n\nWe respect your [privacy](https://www.hobie.com/privacy-policy/)Email Address\n\n![Click to open accessibility widget](https://static.hobie.com/consumer/images/accessibility-widget-icon.png)",
    "metadata": {
      "title": "Mirage Tandem Island | Islands | Hobie",
      "author": "Hobie",
      "google-site-verification": [
        "GaI*REDACTED*1ic",
        "sCg*REDACTED*8Us"
      ],
      "ogLocale": "en_US",
      "msvalidate.01": "5F8*REDACTED*B56",
      "ogSiteName": "Hobie",
      "referrer": "unsafe-url",
      "language": "en",
      "fb:admins": "100009585822541",
      "og:site_name": "Hobie",
      "facebook-domain-verification": "0o0*REDACTED*kq3",
      "viewport": [
        "width=device-width, initial-scale=1, shrink-to-fit=no",
        "width=device-width, initial-scale=1",
        "width=device-width, initial-scale=1",
        "width=device-width, initial-scale=1",
        "width=device-width, initial-scale=1"
      ],
      "robots": [
        "noindex",
        "noindex"
      ],
      "og:type": "website",
      "description": "Sailing has never seemed so simple. When the wind blows, the Hobie Mirage Tandem Island flies across the water, powered by an expansive, easily tended mainsail.",
      "og:locale": "en_US",
      "favicon": "https://static.hobie.com/consumer/images/favicon.ico",
      "scrapeId": "019*REDACTED*761",
      "sourceURL": "https://www.hobie.com/kayaks/mirage-tandem-island/",
      "url": "https://www.hobie.com/kayaks/mirage-tandem-island/",
      "statusCode": 200,
      "contentType": "text/html; charset=utf-8",
      "timezone": "America/New_York",
      "proxyUsed": "basic",
      "cacheState": "miss",
      "indexId": "157*REDACTED*8ec",
      "creditsUsed": 1,
      "concurrencyLimited": false
    }
  }
  ```

- `Glob` - `pattern`: sessions/**/chat_summary.md

  ```
  No files found
  ```

- `Read` - `file_path`: /home/user/.claude/skills/research-premortem/references/premortem-cli-quickref.md

  ````
  1	# Premortem CLI Quick Reference
  2	
  3	## Contents
  4	
  5	1. Installation
  6	2. Project initialization
  7	3. Persona commands
  8	4. Reason commands
  9	5. Graph commands
  10	6. Score commands
  11	7. Mitigation commands
  12	8. Ingest commands (EDSL results -> store)
  13	9. Analysis commands (EDSL-powered)
  14	10. Report and status
  15	
  16	---
  17	
  18	## 1. Installation
  19	
  20	```bash
  21	pip install git+https://github.com/expectedparrot/premortem.git
  22	```
  23	
  24	---
  25	
  26	## 2. Project Initialization
  27	
  28	```bash
  29	premortem init \
  30	  --initiative "Q3 platform migration" \
  31	  --failure "The migration was abandoned after 9 months. Two critical services were left in a half-migrated state, causing weekly outages." \
  32	  --description "Moving from monolith to microservices, affecting 12 teams and 40+ services."
  33	```
  34	
  35	Creates `.premortem/` directory with `meta.json`.
  36	
  37	---
  38	
  39	## 3. Persona Commands
  40	
  41	```bash
  42	premortem persona add --name "Name" --role "Role" --perspective "Their viewpoint"
  43	premortem persona list [--human]
  44	premortem persona show <id> [--human]
  45	premortem persona edit <id> --name "New name" --role "New role"
  46	premortem persona delete <id>
  47	```
  48	
  49	---
  50	
  51	## 4. Reason Commands
  52	
  53	```bash
  54	premortem reason add --persona <persona_id> --kind episodic --text "Detailed narrative..."
  55	premortem reason add --persona <persona_id> --kind structural --text "Detailed narrative..."
  56	premortem reason list [--human]
  57	premortem reason show <id> [--human]
  58	premortem reason edit <id> --text "Updated text"
  59	premortem reason delete <id>
  60	```
  61	
  62	Kinds: `episodic` (event chains) or `structural` (underlying institutional factors).
  63	
  64	---
  65	
  66	## 5. Graph Commands
  67	
  68	```bash
  69	# Nodes
  70	premortem graph add-node --label "Descriptive label" [--reason <reason_id>]
  71	premortem graph list [--human]
  72	premortem graph show <node_id> [--human]
  73	premortem graph remove-node <node_id>
  74	
  75	# Edges (directed: cause -> effect)
  76	premortem graph add-edge --from <source_id> --to <target_id> [--label "mechanism"]
  77	premortem graph remove-edge <edge_id>
  78	
  79	# Export
  80	premortem graph export  # outputs graph structure as JSON
  81	```
  82	
  83	---
  84	
  85	## 6. Score Commands
  86	
  87	```bash
  88	premortem score set <node_id> --likelihood <low|medium|high> --impact <low|medium|high>
  89	premortem score list [--human]
  90	premortem score show <node_id> [--human]
  91	```
  92	
  93	---
  94	
  95	## 7. Mitigation Commands
  96	
  97	```bash
  98	premortem mitigate add --text "Concrete action" --nodes n001,n003
  99	premortem mitigate list [--human]
  100	premortem mitigate show <id> [--human]
  101	premortem mitigate edit <id> --text "Updated text"
  102	premortem mitigate delete <id>
  103	```
  104	
  105	The `--nodes` flag links the mitigation to specific causal graph nodes it targets.
  106	
  107	---
  108	
  109	## 8. Ingest Commands
  110	
  111	Import EDSL results into the premortem store:
  112	
  113	```bash
  114	premortem ingest personas --from .premortem/output/results_personas.json [--replace]
  115	premortem ingest reasons --from .premortem/output/results_reasons.json [--replace]
  116	premortem ingest scores --from <file> [--replace] [--strategy median|mode|max|first]
  117	premortem ingest mitigations --from <file> [--replace]
  118	```
  119	
  120	`--replace` clears existing entities before ingesting.
  121	
  122	---
  123	
  124	## 9. Analysis Commands
  125	
  126	All use EDSL agent panels. All default to Claude Opus.
  127	
  128	```bash
  129	# Generate personas
  130	premortem analyze personas \
  131	  --context "veteran org consultant who knows this institution intimately" \
  132	  --requirements "role_1,role_2,role_3,role_4,role_5"
  133	
  134	# Elicit failure reasons
  135	premortem analyze reasons \
  136	  --domain "specific institutional details: course numbers, budget figures" \
  137	  --good-example "A specific, detailed failure chain..."
  138	
  139	# Elicit mitigations
  140	premortem analyze mitigations \
  141	  --good-example "A specific, actionable mitigation..."
  142	
  143	# Research agenda
  144	premortem analyze research-agenda
  145	
  146	# Executive summary
  147	premortem analyze summary
  148	
  149	# HTML report
  150	premortem analyze report
  151	```
  152	
  153	---
  154	
  155	## 10. Report and Status
  156	
  157	```bash
  158	premortem status [--human]           # Overview of all entities
  159	premortem report generate [--output FILE]  # Markdown report
  160	```
  161	
  162	---
  163	
  164	## Global Flags
  165	
  166	All commands support:
  167	
  168	| Flag | Purpose |
  169	|------|---------|
  170	| `--human` | Rich-formatted terminal output (default is JSON) |
  171	| `--quiet` | Suppress non-error output |
  172	| `--project-dir <path>` | Override default `.premortem/` location |
  173	
  174	---
  175	
  176	## Storage Layout
  177	
  178	```
  179	.premortem/
  180	  meta.json
  181	  personas/       p001.json, p002.json, ...
  182	  reasons/        r001.json, r002.json, ...
  183	  graph/
  184	    nodes/        n001.json, n002.json, ...
  185	    edges/        e001.json, e002.json, ...
  186	  scores/         n001.json (score for node n001), ...
  187	  mitigations/    m001.json, m002.json, ...
  188	  output/
  189	    results_personas.json
  190	    results_reasons.json
  191	    results_mitigations.json
  192	    results_research_agenda.json
  193	    results_exec_summary.json
  194	    report_template.html
  195	    report.html
  196	```
  197
  ````

**Thinking:**

> Good. I have the product details and the CLI reference. No prior chat summaries exist. Let me now gather some specs about the Tandem Island that weren't fully captured in the scrape (weight, dimensions, etc.) and think about what I know.
>
> From the scrape:
> - Hobie Mirage Tandem Island
> - $8,799 USD MSRP
> - Dual MirageDrive 180s (pedal power, forward and reverse)
> - Sail-powered with mainsail
> - Kick-Up Fins
> - Trimaran design (central hull + amas/akas)
> - Centerboard, rudder system
> - Vantage CT seating and Lowrance electronics compatibility
>
> I need to track down the weight and dimensions since those specs are critical for assessing storage, transport, and launching logistics. Given John and Robin's situation in Cataumet with their existing RS Quest and kayaks, the pre-mortem will hinge on whether they can actually manage a boat this size—likely 18+ feet and quite heavy for a trimaran.
>
> The real failure points I'm thinking through: space constraints for storage, the physical demands of launching and hauling out, whether it'll realistically get used more than their current boats, the complexity of maintaining both the sailing rig and pedal drives, and whether the $8,799+ investment makes sense for a couple that might struggle with tandem coordination and the sailing learning curve in Cape Cod's seasonal conditions.

Let me grab the full specs — weight, length, beam — since those are critical for a purchase pre-mortem on something this size:

**Tool calls:**

- `mcp__firecrawl__firecrawl_search` - `query`: Hobie Mirage Tandem Island specs weight length beam width dimensions

  ```
  {
    "success": true,
    "data": {
      "web": [
        {
          "url": "https://www.hobie.com/kayaks/mirage-tandem-island/",
          "title": "Mirage Tandem Island",
          "description": "Length: 18' 6\" / 5.64 m Beam (Amas Folded In): 4' / 1.22 m Beam (Amas Out): 10' / 3.05 m Capacity: 600 lbs / 272 kg. Hull Weight: 130 lbs / 59 kg Fully Rigged ...",
          "position": 1
        },
        {
          "url": "https://westcoastsailing.net/hobie-mirage-tandem-island/?srsltid=Afm*REDACTED*BsH",
          "title": "2026 Hobie Mirage Tandem Island Kayak",
          "description": "Specifications Length: 18' 6\" / 5.64 m Beam (Amas Out): 10' / 3.05 m Beam (Amas In): 4' / Hull Weight: 130 lbs / 59 kg Fully Rigged Weight: 240 lbs. Weight x 2 ...",
          "position": 2
        },
        {
          "url": "https://windtoys.net/mirage-tandem-island-sailing",
          "title": "Hobie Mirage Tandem Island - Wind Toys",
          "description": "Length: 18' 6\" / 5.64. Width: 30\" / .76. Weight x 2: 6.6 lbs / 3 kg Hull Weight: 88 lbs / 39.92 kg Ama Weight: 2 @ 22 lbs / 10 kg Rigged Weight: 190 lbs / 86. ...",
          "position": 3
        }
      ]
    },
    "creditsUsed": 2,
    "id": "019*REDACTED*1d1"
  }
  ```

**Thinking:**

> Now I have the key specs:
> - Length: 18' 6" (5.64 m)
> - Beam (Amas Out): 10' (3.05 m) - that's WIDE
> - Beam (Amas Folded In): 4' (1.22 m)
> - Hull Weight: 130 lbs
> - Fully Rigged Weight: ~240 lbs
> - Capacity: 600 lbs
> - Price: $8,799
>
> This is a BIG, HEAVY, EXPENSIVE piece of equipment. Red Brook Harbor in Cataumet is a relatively sheltered harbor on Buzzards Bay, Cape Cod area.
> I've got solid context here—the user knows what they want and has given me clear details about their location, existing fleet, and who'll be using it. I think I have enough to move forward with a pre-mortem analysis without needing to explain the methodology, though a couple of clarifying questions about their specific use case and risk tolerance would help me shape the failure scenarios more effectively.

This is a great candidate for a pre-mortem — $8,799 for a boat that's 18'6" long, 10 feet wide with the amas out, and 240 lbs fully rigged. That's a serious piece of gear on top of a fleet you already have.

A couple of things that would sharpen the failure analysis:

---

## User
*2026-07-02T13:38:19.374246+00:00*

Q: What does the dream look like if this purchase works out? Weekend sails on Buzzards Bay, exploring the Elizabeth Islands, fishing, replacing the Quest for tandem use, something else?
A: It supplements the Quest

Q: What's your storage and launch situation? This thing is 18 feet long and 240 lbs rigged — do you have waterfront access, a trailer, yard space?
A: Waterfront property

---

## Assistant
*2026-07-02T13:38:34.840692+00:00*

Good context. So the Quest handles your dinghy sailing — the Tandem Island would be the "let's go explore Buzzards Bay together" boat. And waterfront access removes trailering hassles but brings its own set of questions (salt exposure, beach storage, haul-out).

Let me get the infrastructure ready and draft a plan.

Let me install the premortem CLI and check available models:

Everything's ready. Let me scaffold the study and write the plan:

Now let me write the plan:

---

## User
*2026-07-02T13:42:07.835029+00:00*

Q: Here's the plan. The failure statement imagines 18 months out -- the TI is gathering mildew behind the shed while the Quest and kayaks keep getting used. Five personas will independently explain why, then I'll synthesize a causal graph and mitigations. Estimated cost ~$1-2.50 in API credits. Ready to go, or want to adjust anything (personas, failure statement, scope)?
A: Looks good, run it

---

## Assistant
*2026-07-02T13:42:15.143166+00:00*

Let's go. I'll work through each phase systematically.

Good, project initialized. Now let me make the initial commit and then run Phase 1 — persona generation:

Now Phase 1 — generating personas. This will call EDSL with Claude Opus:

Excellent — five rich personas generated. Let me ingest and review them:

Personas are strong — Steve the veteran boat accumulator, Robin the partner who needs it to actually be fun, Derek the Hobie technician who knows what breaks in salt water, Pam the neighbor who watches gear accumulate, and Tom the marine cost analyst. Let me move to Phase 2 — failure narratives:

10 rich failure narratives ingested. Now Phase 3 — I need to read them all and synthesize the causal graph. Let me review the reasons:

Rich narratives — every persona converges on the same core themes. Let me synthesize the causal graph:

Now let me render the causal graph as a Mermaid diagram and convert to PNG:

The causal graph rendered beautifully — five root causes (green) converge through two intermediate effects (amber) to the terminal outcome (red). You can see "Spontaneity death" is the critical convergence node where four independent root causes meet.

Now let me commit Phase 3 and run Phases 4-6 (mitigations, research agenda, executive summary):

All analysis phases complete. Let me read the key outputs to prepare the report:

All analysis phases complete. Now let me read the report style skills and write the report:

Now let me generate the premortem HTML report and then write the full report.md. Given this is for your own purchase decision, I'll keep it practical and direct — no need for a formal pre-writing brief here.

Now let me read a few of the full failure narratives to pull strong quotes for the report:

Now I have rich material. Let me write the report:

Now let me compile to HTML and PDF:

Let me verify the PDF rendered correctly:

PDF looks clean — EP branding, tables rendering properly, blockquotes intact. Let me finalize with the commit and chat summary:

Now let me present the deliverable:

Your pre-mortem is complete. Here's what it found:

**The core finding:** All five personas -- the veteran boat owner, Robin's perspective, the Hobie dealer, the neighbor, and the cost analyst -- independently converged on the same kill mechanism: **spontaneity death**. The 40+ minute rig-launch-recover cycle, Red Brook Harbor's tidal constraints, the MirageDrive maintenance burden, and the enthusiasm gap between you and Robin mean the kayaks and Quest will win the Saturday morning decision almost every time.

**The single most important thing to do before buying:** Rent a Tandem Island for a full weekend and launch it from your actual beach at Red Brook Harbor -- not from a dealer's dock or a boat ramp. Do it at different tide stages. Have Robin keep the log. If the total door-to-water cycle consistently exceeds 40 minutes for two people, or if Robin skips the third outing, do not buy.

**Your deliverables:**
- **PDF report** (9 pages) -- executive summary, causal graph, failure narratives with verbatim quotes, ranked mitigations, research agenda, and early warning signs
- **HTML report** -- same content, self-contained
- **Causal graph** showing how five root causes converge through "spontaneity death" to "the monument"

**Three possible next steps:**

1. **Run the tidal window audit computationally** -- I can pull NOAA tide data for Red Brook Harbor and cross-reference it with weekend availability to see how many usable launch windows actually exist per month
2. **Flip the pre-mortem** -- run the same exercise but with the failure statement inverted ("The Tandem Island was the best purchase you ever made") to identify what success conditions would need to be true
3. **Build a total cost-of-ownership model** -- Tom Brennan's perspective on how $8,799 becomes $12K+ within two years, broken down by component

---

## Files

- [**report.html**](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/report.html) (197.6 KB)
- [Dockerfile](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/Dockerfile) (0 B)
- [Makefile](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/Makefile) (0 B)
- [README.md](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/README.md) (470 B)
- [chat_summary.md](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/chat_summary.md) (2.0 KB)
- [plan.md](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/plan.md) (5.0 KB)
- [requirements.txt](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/requirements.txt) (0 B)
- [appendix.md](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/appendix.md) (0 B)
- [ep_logo.pdf](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/ep_logo.pdf) (4.6 KB)
- [fix-table-widths.lua](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/fix-table-widths.lua) (4.8 KB)
- [planning.md](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/planning.md) (0 B)
- [premortem_report.html](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/premortem_report.html) (107.5 KB)
- [report.css](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/report.css) (4.7 KB)
- [report.md](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/report.md) (21.5 KB)
- [report.pdf](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/report.pdf) (227.8 KB)
- [report_header.tex](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/report_header.tex) (2.2 KB)
- [run_job.py](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/edsl_jobs/job_a/run_job.py) (0 B)
- [study_agent_list.py](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/edsl_jobs/job_a/study_agent_list.py) (0 B)
- [study_model_list.py](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/edsl_jobs/job_a/study_model_list.py) (0 B)
- [study_scenario_list.py](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/edsl_jobs/job_a/study_scenario_list.py) (0 B)
- [causal_graph.mmd](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/plots/causal_graph.mmd) (1.6 KB)
- [causal_graph.png](https://www.expectedparrot.com/api/macaw/share/akw1RJN4BouvzTmI9klxnw/files/sessions/topic_tandem-island-purchase/study_a/writeup/plots/causal_graph.png) (126.1 KB)