# 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* 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:** - `mcp__firecrawl__firecrawl_scrape` - `url`: https://www.hobie.com/kayaks/mirage-tandem-island/ - `Glob` - `pattern`: sessions/**/chat_summary.md - `Read` - `file_path`: /home/user/.claude/skills/research-premortem/references/premortem-cli-quickref.md - `mcp__firecrawl__firecrawl_search` - `query`: Hobie Mirage Tandem Island specs weight length beam width dimensions --- ## Assistant *2026-07-02T13:37:03.945520+00:00* 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/ - `Glob` - `pattern`: sessions/**/chat_summary.md - `Read` - `file_path`: /home/user/.claude/skills/research-premortem/references/premortem-cli-quickref.md - `mcp__firecrawl__firecrawl_search` - `query`: Hobie Mirage Tandem Island specs weight length beam width dimensions --- ## Assistant *2026-07-02T13:37:31.059074+00:00* 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_scrape` - `url`: https://www.hobie.com/kayaks/mirage-tandem-island/ - `Glob` - `pattern`: sessions/**/chat_summary.md - `Read` - `file_path`: /home/user/.claude/skills/research-premortem/references/premortem-cli-quickref.md - `mcp__firecrawl__firecrawl_search` - `query`: Hobie Mirage Tandem Island specs weight length beam width dimensions --- ## Assistant *2026-07-02T13:37:46.389832+00:00* 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: **Tool calls:** - `mcp__firecrawl__firecrawl_scrape` - `url`: https://www.hobie.com/kayaks/mirage-tandem-island/ - `Glob` - `pattern`: sessions/**/chat_summary.md - `Read` - `file_path`: /home/user/.claude/skills/research-premortem/references/premortem-cli-quickref.md - `mcp__firecrawl__firecrawl_search` - `query`: Hobie Mirage Tandem Island specs weight length beam width dimensions --- ## 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. --- ## Assistant *2026-07-02T13:38:48.390079+00:00* Let me install the premortem CLI and check available models: --- ## Assistant *2026-07-02T13:39:19.440788+00:00* Everything's ready. Let me scaffold the study and write the plan: --- ## Assistant *2026-07-02T13:39:35.809055+00:00* 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. --- ## Assistant *2026-07-02T13:42:58.466468+00:00* Good, project initialized. Now let me make the initial commit and then run Phase 1 — persona generation: --- ## Assistant *2026-07-02T13:43:16.346614+00:00* Now Phase 1 — generating personas. This will call EDSL with Claude Opus: --- ## Assistant *2026-07-02T13:44:13.279567+00:00* Excellent — five rich personas generated. Let me ingest and review them: --- ## Assistant *2026-07-02T13:44:27.849802+00:00* 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: --- ## Assistant *2026-07-02T13:45:56.910731+00:00* 10 rich failure narratives ingested. Now Phase 3 — I need to read them all and synthesize the causal graph. Let me review the reasons: --- ## Assistant *2026-07-02T13:46:29.898338+00:00* Rich narratives — every persona converges on the same core themes. Let me synthesize the causal graph: --- ## Assistant *2026-07-02T13:47:13.992912+00:00* Now let me render the causal graph as a Mermaid diagram and convert to PNG: --- ## Assistant *2026-07-02T13:48:51.325504+00:00* 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): --- ## Assistant *2026-07-02T13:51:53.488769+00:00* All analysis phases complete. Let me read the key outputs to prepare the report: --- ## Assistant *2026-07-02T13:53:00.137936+00:00* All analysis phases complete. Now let me read the report style skills and write the report: --- ## Assistant *2026-07-02T13:53:18.618322+00:00* 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. --- ## Assistant *2026-07-02T13:53:32.734453+00:00* Now let me read a few of the full failure narratives to pull strong quotes for the report: --- ## Assistant *2026-07-02T13:53:52.034084+00:00* Now I have rich material. Let me write the report: --- ## Assistant *2026-07-02T13:56:45.793123+00:00* Now let me compile to HTML and PDF: --- ## Assistant *2026-07-02T13:57:23.198375+00:00* Let me verify the PDF rendered correctly: --- ## Assistant *2026-07-02T13:57:43.000191+00:00* PDF looks clean — EP branding, tables rendering properly, blockquotes intact. Let me finalize with the commit and chat summary: --- ## Assistant *2026-07-02T13:58:38.671337+00:00* Now let me present the deliverable: --- ## Assistant *2026-07-02T13:59:07.681548+00:00* 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)